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WO2009007994A2 - Composition de matières pour la production de matériau composite à base de résine prépolymérisée et de cendres volantes - Google Patents

Composition de matières pour la production de matériau composite à base de résine prépolymérisée et de cendres volantes Download PDF

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Publication number
WO2009007994A2
WO2009007994A2 PCT/IN2008/000264 IN2008000264W WO2009007994A2 WO 2009007994 A2 WO2009007994 A2 WO 2009007994A2 IN 2008000264 W IN2008000264 W IN 2008000264W WO 2009007994 A2 WO2009007994 A2 WO 2009007994A2
Authority
WO
WIPO (PCT)
Prior art keywords
fly ash
composition
materials
production
polymerized resin
Prior art date
Application number
PCT/IN2008/000264
Other languages
English (en)
Other versions
WO2009007994A3 (fr
Inventor
Shilpa Pradeep Joshi
Pradeep Vasant Joshi
Original Assignee
Shilpa Pradeep Joshi
Pradeep Vasant Joshi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shilpa Pradeep Joshi, Pradeep Vasant Joshi filed Critical Shilpa Pradeep Joshi
Publication of WO2009007994A2 publication Critical patent/WO2009007994A2/fr
Publication of WO2009007994A3 publication Critical patent/WO2009007994A3/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K11/00—Use of ingredients of unknown constitution, e.g. undefined reaction products
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
    • C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
    • C08L31/04—Homopolymers or copolymers of vinyl acetate

Definitions

  • the present invention relates to a composition of the material for the production of fly ash pre polymerised resin composites more particularly the invention relates to polymeric binding compositions useful in civil engineering.
  • the bonding mortar typically contains Portland cement, sand /silica and water as main ingredients, where Portland cement and silica of specific grade are mixed in a ratio of 1 :4 or 1: 5 and sufficient quantity of water is added for workability. Often additives such as fibres, re-dispersible polymers and waterproofing compounds etc., are added to enhance the resistance to water, and resistance to cracking etc.
  • the purpose of the mortar made thereof is to hold the bricks/ blocks together and to bind them to each other, and the strength of the bond is supposed to be more than the strength of the brick / block. Curing with potable water for 7 days minimum is essential to complete the hydration process within the mortar and attain the optimum strength of the mortar bond.
  • Both these materials are applied with trowels (naila) between the brick surfaces, to bind .
  • All the mortaring materials are Portland cement based, with additives of varied nature to improvise different properties such as crack reduction, strength, ease in application, weathering etc.
  • the Portland cement-based mortar needs post watering for curing. Post curing of mortar is affected by sprinkling of water thereby causing expansion of cement particles (hydration) thus forming a compact structure. Curing of cement has to be a normal ambient 20-30 C in humid atmosphere. At low temperature the rate of curing is affected negatively. Cement based products are pre-designed for short pot life and difficult for handling. In case of slow working the cement -sand mixture gets hydrolysed and get thicker thus affecting adhesion and curing rate.
  • the water used for mixing the Portland cement and sand is used for formation of CSH by combination of water and CaO and sulphates present in the Portland cement, which attains its 60% of total strength in 28 days. Loss of water from the product during this time, leads to inadequate strength to the plaster. The heat of hydration produced during this process is high. Inadequate curing thereby leads to cracking on surfaces.
  • the regular Portland cement plaster is prepared and additives such as plasticizers and water proofing chemicals are added to the product. However the materials are basically in dry powder form and mixed with water on site. The bonding between the existing surfaces and the old surfaces is not always good and the patches seem to appear after the repair work. Some times de- bonding is also observed. The repairs as such tend to show patch works and not a homogenous surface. The pot life of the repair mix is also limited.
  • the cracks seen on wall facades, external or internal are a big issue in the construction industry. These cracks arise due to several reasons some of which are uncontrolled such as uneven settlement of masses, while few others arise out of common construction practises, such as inadequate curing, the quality of raw materials in composite mix, application process, time gap between construction of the two surfaces, and so on. These cracks need to be filled with suitable material, which binds the two edges of the crack, and prevent the ingress of water, which ultimately leads moisture in wall, fungal development and damage to the structure therein.
  • the most common practice of filing these cracks is by mixing Portland cement, with fine graded silica, plasticizers, waterproofing chemicals/construction chemicals and water. These ingredients are suitably mixed on site, before application and used immediately due to short pot life. Curing of surface after application is essential to ensure bonding. There is often a tendency of shrinkage, which loosens out the material, leading 80 to expansion of cracks.
  • the new invented product is designed to overcome all these issues caused due to presence of Portland cement, by suitably varying the various ingredients, and/ or their proportions in the composite.
  • the use of Fly ash and polymer emulsion is quite old. There are references made to such combinations.
  • the invention of Cold waterless setting mortar relates to the use of fly ash, containing controlled amounts of fly ash along with few other types of filler natural or to provide requited formulations.
  • paint or as mastic is composed of ultra fine pulverised fly ash, a low viscosity Vinyl acrylic type emulsion polymer as binder in water.
  • the composition suggests use of 24 % Fly ash and 24-50 % Emulsion as paint coating having good flexibility. .
  • Manjit Singh and Mridul Garg have studied Flyash as reactive pozzolonic 100 materials.
  • the name pozzlana is derived from Latin pulvis puteolanus and refers to pyroclastic deposits erupted by Campi Flegrei volcanic field. Long back in ancient time it was discovered that these pozzolonic deposits with lime produced exceptional cement.
  • Pozzolonic materials by themselves are not cement, but contain reactive silica, 105 which reacts with lime to setting hard cement in time.
  • Artificial pozzlana are made from fly ash produced by coal burning power plants all over the world. They have suggested use of such materials for sandwich composite designs combining high tensile strength skins with lightweight, rigid core.
  • US Patent 7255738 B2 suggests use of lightweight cementitiuous materials for 110 composite boards and partitions such as insulating panels.
  • the newly invented Eco Friendly Composition of fly ash, pre polymerized resin composite without Portland cement offers solution on various problems arising during and after mortaring and plastering of the walls.
  • the product is designed to offer total replacement to conventional Portland cement based mortars and
  • the product is completely Portland cement free and designed as based on
  • waste recycled products such as Flyash, polymer binder of the type - Pure Acrylic, Styrene Acrylic, Poly Vinyl Acetate, or Chloride, Poly urethane, CNSL, Shellac, Silicon emulsion, Tar etc and other fillers such as stone/silica fillers, bio products like fibres.
  • waste recycled products such as Flyash, polymer binder of the type - Pure Acrylic, Styrene Acrylic, Poly Vinyl Acetate, or Chloride, Poly urethane, CNSL, Shellac, Silicon emulsion, Tar etc and other fillers such as stone/silica fillers, bio products like fibres.
  • NO POST CURING with precious water. It is designed
  • the flow of the product can be adjusted to make it suitable for pumping, squeezing etc
  • the present invention relates to a composition of the material for the production . of fly ash pre polymerised resin composites more particularly the invention relates to polymeric binding compositions and particularly to coating compositions useful as an adhesive for clay bricks, Fly ash bricks, aerated concrete blocks, cement blocks etc., used as building blocks for civil
  • the product is designed to be used in building / construction industry as a self-curing, crack resistant, eco friendly, ready to use composite useful as a brick / block laying adhesive, render/plaster, crack filler, repair plaster, etc.
  • an effective binding cement composition is composed basically of fly ash, a vinyl, styrene, acrylic CNSL, Shellac type polymer emulsion binder and water.
  • the Binding composition in accordance with the invention is useful as a mortar which can be 155 applied to bricks, fly ash building/ blocks to provide a adhesive building mortar layer, as a plaster/render, crack filler and repair mortar/plaster etc.
  • the invention thus contributes to Building industry and also contributes to improvement of the ecology by providing a valuable outlet and use for waste fly ash, as well as by saving the water requirement. This relieves the problem of
  • the adhesive binding mortar composition in accordance with the present invention consists basically of ultra fine pulverized fly ash, a heat resistant synthetic latex binder and sufficient water for rendering the composition sufficiently thick for application to a brick's surface as a thick mortar layer or
  • composition for example by trowelling.
  • the composition can also be mixed with fibrous or other filler for enhancing properties such as crackles ness, strength, water resistance, heat and fire resistance etc.
  • the fly ash is of the kind recovered from flue gases in the combustion of coal and is preferably of a fineness to pass through a 180-mesh screen. If the fly
  • 170 ash as recovered from the flue gas contains larger particles, these are screened out or the fly ash is pulverized, for example in a ball mill, to reduce the particle size. If the fly ash recovered from the flue gas contains combustible particles, for example unburned carbon, they are burned out or otherwise removed.
  • the ultra fine fly ash is the basic component of the composition and
  • 175 preferably comprises 7% - 80 % of the composition by weight.
  • lightweight inert inorganic material such as calcite, marble, calcium carbonate, silica, china clay in the form of fine powder. Mixing fly ash of various grades in terms of its particle sizes is beneficial as it supports the faster drying, increases water
  • Bottom ash, fumed silica, rice husk etc can optionally be good replacements partially or fully or in combination.
  • the C type Fly Ash consists of higher percentage of CaO when compared to the F type of Fly Ash, which gives better pozzolonic properties to the C type;
  • the present invention relates to a composition of the material for the production of fly ash pre polymerised resin composites more particularly the invention
  • 195 relates to polymeric binding compositions and particularly to coating compositions useful as an adhesive for clay bricks, Fly ash bricks, aerated concrete blocks, cement blocks etc., used as building blocks for civil construction activities, as plaster /render for building surfaces, as a crack filler, as a repair plaster, as a fire and heat resistant plaster/ mastic etc.
  • the product relates to polymeric binding compositions and particularly to coating compositions useful as an adhesive for clay bricks, Fly ash bricks, aerated concrete blocks, cement blocks etc., used as building blocks for civil construction activities, as plaster /render for building surfaces, as a crack filler, as a repair plaster, as a fire and heat resistant plaster/ mastic etc.
  • Polymer emulsion 200 is designed to be used in building / construction industry as a self-curing, crack resistant, eco friendly, ready to use composite useful as a brick / block laying adhesive, render/plaster, crack filler, repair plaster, etc.
  • Polymer emulsion defines trade available water based colloidal dispersions manufactured by polymerisation process of either acrylic or
  • polystyrene polymers 205 polystyrene polymers.
  • Polymer emulsions can enhance the applicability and flow properties and strength of such products.
  • the binder used is a low viscosity vinyl acrylic type emulsion polymer having the properties of being stable and compatible with other components and of forming a film which is tough and flexible and resistant to cracking and which
  • the binder has outstanding permanence, durability, adhesion and binding capacity.
  • the binder is totally water thin able and stable at all normal conditions of storage and usage.
  • the amount of binder used is 1 - 40% (solid content)of the composition by weight. Proportions have varied as per the purpose of the product and its desired properties ad performance.
  • 215 found satisfactory is 261 , 500, 2438, which are 100% acrylic emulsion polymer produced by Rohm & Haas Co. It is designed to give excellent outdoor durability and excellent adhesion under damp or dry conditions. Moreover, mortar compositions made with these polymer emulsions are easily applied and dry rapidly to produce films with extended flexibility and excellent resistance to
  • the fly ash is of the kind recovered from flue gases in the combustion of coal and is preferably of a fineness to pass through a 180-mesh screen. If the fly ash as recovered from the flue gas contains larger particles, these are screened out or the fly ash is pulverized, for example in a ball mill, to reduce 230 the particle size. If the fly ash recovered from the flue gas contains combustible particles, for example unburned carbon, they are burned out or otherwise removed.
  • the ultra fine fly ash is the basic component of the composition and preferably comprises 7- 80 % of the composition by weight. In some cases it has been found desirable to include in addition to the fly ash lightweight inert
  • inorganic material such as calcite, marble, calcium carbonate, silica, china clay in the form of fine powder.
  • Mixing fly ash of various grades in terms of its particle sizes is beneficial as it supports the faster drying, increases water resistance due to close packing of particles, increases the mechanical strength, shear strength, etc.
  • the C type Fly Ash consists of higher percentage of CaO when compared to the F type of Fly Ash, which gives better pozzolonic properties to the C type, when compared to the F type.
  • the CaO present in the F type Flyash . in the presence of moisture hydrates to form CSH, which adds to the strength .-. of the composite.
  • the combination of Fly ash and water does not posses -
  • the thinner used in the composition is water, which may constitute from (8- 55%) by weight of the composition depending on the use to which the thinner used in the composition.
  • composition is to be put like burnt clay bricks of fly ash blocks and their porosity. Building blocks need more water for absorption.
  • the composition preferably contains one or more of the following additives, namely inorganic pigment, a dispersant, a de foamer, a plasticizer, a thickener, a drying agent, a
  • a fungicide and an agent for controlling the pH of the composition so as to inhibit corrosion when the composition is applied to a metal surface.
  • an inorganic pigment can be added when other colours are desired.
  • a suitable pigment is titanium dioxide (TiO 2 - R900), which is a conventional white pigment and hence lightens the colour of the
  • the Ti ⁇ 2 can be used in an amount of for example 1- 10% by weight of the composition. Additional or other pigments can be used when other colours are desired.
  • a water-compatible dispersant such for example as
  • the amount of dispersant used is preferably in the range of 0.1% to 0. 5% by weight.
  • de foamer In order to prevent foaming of the composition when it is being mixed, it is desirable to use a water-compatible de foamer.
  • the amount of de foamer used may vary from 0.3 -1.5% by weight.
  • a plasticizer such as Texanol produced by Eastman Chemical Products Inc.
  • the composition of Texanol is 2,2,4-trimethyl-1 , 3 - pentanediol mono-iso- butyrate.
  • Another suitable plasticizer is tricresyl phosphate.
  • the amount of plasticizer is 2,2,4-trimethyl-1 , 3 - pentanediol mono-iso- butyrate.
  • 275 may vary from 0.2 - 2% by weight.
  • a thickener such as Cello size QP15000 produced by Union Carbide Corporation can be used.
  • Cello size is hydroxyethyl cellulose produced by reacting alkali treated cellulose with ethylene oxide under carefully controlled conditions. The amount of thickener
  • 280 used may vary from 0.1-1.0% by weight.
  • drying agents are Nalcoag 1034-A and Nalcoag 1050 both produced by Nalco Chemical Company.
  • Nalcoag 1034-A is acidic pH aqueous colloidal silica dispersion, which is relatively non-toxic.
  • Nalcoag 1050 285 is a colloidal dispersion of submicron size silica particles in the form of tiny spheres.
  • Sodium silicate can also be used as a drying agent.
  • the amount of drying agent used may vary from 0.1- 6% by weight. Drying of the mortar can also be affected by variety of range of particle size of Fly Ash. Higher range particle size reduces drying time.
  • a preservative such as Dowicil 75 produced by the Dow Chemical Company.
  • Dowicil 75 is 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride to which a stabilizer (sodium bicarbonate) has been added.
  • the amount of preservative used may vary from 0.1-1.0%.
  • fungicide to inhibit the growth of any fungi in the composition.
  • a suitable fungicide is Nopcocide N-96 produced by Diamond Shamrock Corporation.
  • the chemical composition of Nopcocide N-96 is 2,4,5,6-tetrachloro-isophthalonitrile.
  • the amount of fungicide used may vary from 0.1 -1.0%.
  • silica / china clay / Calcium carbonate / stone chips which act as inorganic fillers.
  • Other fillers like coconut shell chips / crushing of various sizes further augmented this.
  • fillers of different mesh of sources such as silicates, quartz, stone crushing, coconut shell crushing, Polystyrene balls/
  • surfactant such as lgepal CO-630 produced by GAF Corporation.
  • the chemical composition of lgepal CO-630 is nonylphenoxypoly-(ethyleneoxy) ethanol.
  • the amount of surfactant included in the composition may vary from about 0.2-1%.
  • water based resin system dissolved in suitable solvent such as MTO / xylene.
  • suitable solvent such as MTO / xylene.
  • 315 affects the cost of the materials. Examples include alkyd, CNSL, Coal tar etc. It is a ready- to- use material and needs no mixing on site. It is available in easy handling packing as per demand. This enables control both on quality and quantity. There is no need of water, which not only saves it but also prevents on site contamination.
  • the product has excellent adhesion to the substrate.
  • the product is hence lifelong use.
  • Adhesion test In a test, mastic was applied in uniform thickness of 6 mm on a glass tile. Upon
  • the composite was kept in a open pot , and subjected to varying grades of temperature between '- 6o' to ' 60o' C ,in a cyclic pattern .In 10 cycles no
  • Bond strength increase with the thickness applied .
  • Bond strength decreases as per reduced quantity of fly ash.
  • the mortar composition in accordance with the present invention can be conveniently produced in a rotary mixer (pug mill)
  • the water, dispersing agent, antifoaming agent and preservative are introduced in the mixer and mixed for about five minutes at a speed of for example 200 RPM.
  • Pigments, pulverized fly ash and other solids are introduced and mixed for about twenty minutes. This is followed by the binder and plasticizer mixed for about five minutes.
  • Remaining constituents such as sodium silicate, colloidal

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne une composition de matières pour la production de matériaux composites à base de résine prépolymérisée et de cendres volantes. Plus précisément, l'invention concerne des compositions polymères de liaison et, en particulier, des compositions d'enduction utilisables comme adhésifs pour des briques en argile, des briques en cendres volantes, des blocs de béton alvéolés, des blocs de ciment, etc., utilisés en tant que blocs de construction dans le cadre de travaux de génie civil et de construction, comme plâtre/crépi sur les surfaces de construction, comme enduit de rebouchage, comme plâtre de réparation, comme plâtre/mastic ignifuge et thermorésistant, etc. Ce produit est conçu pour être utilisé dans l'industrie de la construction/du bâtiment en tant que matériau composite autodurcissable, résistant aux fissures, écologique, facile à utiliser et utilisable en tant qu'agent adhésif pour la mise en place des briques/blocs, crépi/plâtre, enduit de rebouchage, plâtre de réparation, etc. La composition est constituée de cendres volantes pulvérisées ultrafines, d'un acétate de polyvinyle à faible viscosité (VAM), de styrène-acrylique, d'acrylique pur, de CNSL (baume de cajou), de silicium, d'un polymère en émulsion de type shellac qui sert de liant et d'eau. La composition contient, également et de préférence, au moins l'un des ingrédients suivants : un dispersant, un désémulsifiant, un plastifiant, un épaississant, un dessiccateur, un conservateur, un fongicide, des charges à base de silice ou de quartz de numéros de tamis différents, ainsi qu'un ingrédient visant à réguler le pH de la composition.
PCT/IN2008/000264 2007-04-27 2008-04-25 Composition de matières pour la production de matériau composite à base de résine prépolymérisée et de cendres volantes WO2009007994A2 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
IN834MU2007 2007-04-27
IN832MU2007 2007-04-27
IN834/MUM/2007 2007-04-27
IN832/MUM/2007 2007-04-27
IN70/MUM/2008 2008-01-09
IN72/MUM/2008 2008-01-09
IN72MU2008 2008-01-09
IN70MU2008 2008-01-09

Publications (2)

Publication Number Publication Date
WO2009007994A2 true WO2009007994A2 (fr) 2009-01-15
WO2009007994A3 WO2009007994A3 (fr) 2009-12-30

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PCT/IN2008/000264 WO2009007994A2 (fr) 2007-04-27 2008-04-25 Composition de matières pour la production de matériau composite à base de résine prépolymérisée et de cendres volantes

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102206069A (zh) * 2011-04-25 2011-10-05 无锡市康顺节能材料科技有限公司 一种砌筑免烧保温砖的砂浆
CN102051943B (zh) * 2009-11-09 2012-07-04 广东绿由环保科技股份有限公司 一种用城市污泥生产的烧结轻质环保砖及其制造方法
US8329308B2 (en) 2009-03-31 2012-12-11 United States Gypsum Company Cementitious article and method for preparing the same
US8568544B2 (en) 2007-02-12 2013-10-29 United States Gypsum Company Water resistant cementitious article and method for preparing same
WO2017199111A1 (fr) * 2016-05-20 2017-11-23 Bawri Binod Kumar Composition de plâtre écologique produite à partir de cendres de bassin
US9920179B2 (en) * 2015-09-22 2018-03-20 The University Of Akron Encapsulation of fly ash by polymers
CN109678424A (zh) * 2019-01-14 2019-04-26 青岛天利兴达新型建材有限公司 一种蒸压加气混凝土砌块及其制备方法
US10336036B2 (en) 2013-03-15 2019-07-02 United States Gypsum Company Cementitious article comprising hydrophobic finish

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229329A (en) * 1979-02-15 1980-10-21 Herbert Bennett Fire retardant coating composition comprising fly ash and polymer emulsion binder
US4287241A (en) * 1976-05-11 1981-09-01 Global Coatings Limited Roof coating composition and construction
US6200381B1 (en) * 1995-12-05 2001-03-13 Periclase Pty. Ltd. Settable composition and uses therefor
US20070062415A1 (en) * 2005-03-22 2007-03-22 Tricia Guevara Lightweight concrete compositions

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287241A (en) * 1976-05-11 1981-09-01 Global Coatings Limited Roof coating composition and construction
US4229329A (en) * 1979-02-15 1980-10-21 Herbert Bennett Fire retardant coating composition comprising fly ash and polymer emulsion binder
US6200381B1 (en) * 1995-12-05 2001-03-13 Periclase Pty. Ltd. Settable composition and uses therefor
US20070062415A1 (en) * 2005-03-22 2007-03-22 Tricia Guevara Lightweight concrete compositions

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8568544B2 (en) 2007-02-12 2013-10-29 United States Gypsum Company Water resistant cementitious article and method for preparing same
US8329308B2 (en) 2009-03-31 2012-12-11 United States Gypsum Company Cementitious article and method for preparing the same
CN102051943B (zh) * 2009-11-09 2012-07-04 广东绿由环保科技股份有限公司 一种用城市污泥生产的烧结轻质环保砖及其制造方法
CN102206069A (zh) * 2011-04-25 2011-10-05 无锡市康顺节能材料科技有限公司 一种砌筑免烧保温砖的砂浆
CN102206069B (zh) * 2011-04-25 2012-12-12 无锡市康顺节能材料科技有限公司 一种砌筑免烧保温砖的砂浆
US10336036B2 (en) 2013-03-15 2019-07-02 United States Gypsum Company Cementitious article comprising hydrophobic finish
US9920179B2 (en) * 2015-09-22 2018-03-20 The University Of Akron Encapsulation of fly ash by polymers
WO2017199111A1 (fr) * 2016-05-20 2017-11-23 Bawri Binod Kumar Composition de plâtre écologique produite à partir de cendres de bassin
CN109678424A (zh) * 2019-01-14 2019-04-26 青岛天利兴达新型建材有限公司 一种蒸压加气混凝土砌块及其制备方法

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