CN105271995A - Concrete for cast-in-place building and preparation method of concrete - Google Patents
Concrete for cast-in-place building and preparation method of concrete Download PDFInfo
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- CN105271995A CN105271995A CN201510665206.0A CN201510665206A CN105271995A CN 105271995 A CN105271995 A CN 105271995A CN 201510665206 A CN201510665206 A CN 201510665206A CN 105271995 A CN105271995 A CN 105271995A
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Abstract
The invention discloses concrete for a cast-in-place building and a preparation method of the concrete. The concrete comprises the following substances in parts by mass: 300-350 parts of cement, 40-45 parts of mineral powder, 500-600 parts of stone, 1000-1200 parts of aggregate, 2-3 parts of glass fiber, 3-5 parts of air-entraining agent, 15-25 parts of auxiliary additive and 600-700 parts of water. The concrete has uniform, stable, closed and noncommunicating micro bubbles, so that the formation of capillary channels in the concrete is avoided; expansion pressure generated by free water due to freezing is alleviated; the frost resistance of the concrete is effectively improved; the glass fiber is distributed chaotically in the concrete; due to lower tensile strength of the concrete, the glass fiber can assist the concrete to bear tension stress and transmit the tension stress; expansion of macro cracks is prevented, so that the toughness of the concrete is improved; and the structural strength of the concrete is improved by the aggregate, so that the concrete building can bear a greater force.
Description
Technical field
The present invention relates to a kind of cast-in-place concrete for building and preparation method thereof.
Background technology
The pore porous insert that concrete is made up of sand-cement slurry and coarse aggregate.When mixing concrete in order to obtain necessary workability, the mixing water added is always more than the water of hydration of cement.This part unnecessary water is just stranded in concrete the pore forming connection with the form of free-water, and occupies certain volume.For the construction work of northern China cold district, concrete in hydro project, 1), when concrete is in water-saturated state: water meets cold junction ice volumetric expansion can occur, when the pressure produced is greater than concrete tensile strength, the destruction of concrete inner structure can be caused when expanding.Under freeze-thaw cycle effect repeatedly, concrete peeling off and the reduction of intensity can be caused.2), when concrete is in water-saturated state: the non-capillary hole that the gel pore formed after some hydrated cementitious except pore in concrete and other reasons are formed, in these spaces, often air is mixed with.Therefore, when the water freezing in pore expands, these pores can play dash adjustment effect, the water that a part is not frozen can be clamp-oned gel pore and non-capillary hole, thus reduce the swelling pressure; But under the effect of freeze-thaw cycle, the water clamp-oning gel pore and non-capillary hole can get more and more, until be in state of saturation, finally cause the concrete reduction with intensity of peeling off.
At present, the concrete major part used in the civil engineering work of cold district, hydro project is normal concrete, after standing the freeze-thaw cycle effect of less than 100 times, namely intensity significantly reduce, loss of strength is too fast, and under freeze-thaw cycle effect, concrete skin easily peels off, is separated.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cast-in-place concrete for building, this concrete has evenly, stablize, close, mutual disconnected micro-bubble, avoid forming capillary channel in concrete, relax free water and freezed the produced swelling pressure, the concrete anti-freezing property of effective raising, can resist the fast freeze-thaw Circulation of more than 500 times.Glass fibre is disorderly and unsystematic distribution in concrete, and because concrete tensile strength is lower, the existence of glass fibre can assist concrete to bear tensile stress, transmit tensile stress, stops the expansion of macroscopic fracture, thus improves concrete toughness; Under freeze-thaw cycle effect, the existence of glass fibre can effectively improve concrete antistripping, separating power, reduces mass loss, increases concrete structural strength, make concrete construction can bear larger dynamics by aggregate.
For solving the problem, the present invention adopts following technical scheme:
A cast-in-place concrete for building, comprises the material composition of following mass fraction:
Cement 300-350 part
Breeze 40-45 part
Stone 500-600 part
Aggregate 1000-1200 part
Glass fibre 2-3 part
Air entrapment agent 3-5 part
Supplementary additive 15-25 part
Water 600-700 part.
Preferably, the material composition of following mass fraction is comprised: cement 300 parts, breeze 40 parts, 500 parts, stone, 1000 parts, aggregate, 2 parts, glass fibre, air entrapment agent 3 parts, supplementary additive 15 parts, 600 parts, water.
Preferably, the material composition of following mass fraction is comprised: cement 350 parts, breeze 45 parts, 600 parts, stone, 1200 parts, aggregate, 3 parts, glass fibre, air entrapment agent 5 parts, supplementary additive 25 parts, 700 parts, water.
Preferably, the material composition of following mass fraction is comprised: cement 350 parts, breeze 40 parts, 600 parts, stone, 1000 parts, aggregate, 3 parts, glass fibre, air entrapment agent 3 parts, supplementary additive 25 parts, 700 parts, water.
Preferably, the material composition of following mass fraction is comprised: cement 330 parts, breeze 40 parts, 600 parts, stone, 1200 parts, aggregate, 2 parts, glass fibre, air entrapment agent 5 parts, supplementary additive 25 parts, 600 parts, water.
Preferably, the material composition of following mass fraction is comprised: cement 350 parts, breeze 45 parts, 600 parts, stone, 1100 parts, aggregate, 3 parts, glass fibre, air entrapment agent-5 parts, supplementary additive 25 parts, 600 parts, water.
Preferably, described cement is ordinary Portland cement.
Preferably, described air entrapment agent is rosined soap class air entrapment agent.
A cast-in-place concrete preparation method for building, comprises following preparation process:
1) material of following mass fraction is chosen: breeze, stone, aggregate, glass fibre, air entrapment agent and supplementary additive; Selected above component dropped in stirrer, uniform stirring 15-25min, obtains stirring thing;
2) cement is added in stirring thing, then uniform stirring 5-10min, obtains just step concrete;
3) be added into by water in first step concrete, then uniform stirring 5-10min, has stirred rear standing 10-15min, namely obtains cast-in-place concrete for building of the present invention
The invention has the beneficial effects as follows: this concrete has evenly, stablize, close, mutual disconnected micro-bubble, avoid forming capillary channel in concrete, relax free water and freezed the produced swelling pressure, the concrete anti-freezing property of effective raising, can resist the fast freeze-thaw Circulation of 500 times.Glass fibre is disorderly and unsystematic distribution in concrete, and because concrete tensile strength is lower, the existence of glass fibre can assist concrete to bear tensile stress, transmit tensile stress, stops the expansion of macroscopic fracture, thus improves concrete toughness; Under freeze-thaw cycle effect, the existence of glass fibre can effectively improve concrete antistripping, separating power, reduces mass loss, and concrete preparation technology of the present invention is comparatively simple simultaneously, and preparation more for convenience, is adapted at comparatively cold place and promotes the use of.
Embodiment
Below the preferred embodiments of the present invention are described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
A cast-in-place concrete for building, comprises the material composition of following mass fraction:
Cement 300-350 part
Breeze 40-45 part
Stone 500-600 part
Aggregate 1000-1200 part
Glass fibre 2-3 part
Air entrapment agent 3-5 part
Supplementary additive 15-25 part
Water 600-700 part.
Preferably, the material composition of following mass fraction is comprised: cement 300 parts, breeze 40 parts, 500 parts, stone, 1000 parts, aggregate, 2 parts, glass fibre, air entrapment agent 3 parts, supplementary additive 15 parts, 600 parts, water.
Preferably, the material composition of following mass fraction is comprised: cement 350 parts, breeze 45 parts, 600 parts, stone, 1200 parts, aggregate, 3 parts, glass fibre, air entrapment agent 5 parts, supplementary additive 25 parts, 700 parts, water.
Preferably, the material composition of following mass fraction is comprised: cement 350 parts, breeze 40 parts, 600 parts, stone, 1000 parts, aggregate, 3 parts, glass fibre, air entrapment agent 3 parts, supplementary additive 25 parts, 700 parts, water.
Preferably, the material composition of following mass fraction is comprised: cement 330 parts, breeze 40 parts, 600 parts, stone, 1200 parts, aggregate, 2 parts, glass fibre, air entrapment agent 5 parts, supplementary additive 25 parts, 600 parts, water.
Comprise the material composition of following mass fraction: cement 350 parts, breeze 45 parts, 600 parts, stone, 1100 parts, aggregate, 3 parts, glass fibre, air entrapment agent-5 parts, supplementary additive 25 parts, 600 parts, water.
Described cement is ordinary Portland cement.
Described air entrapment agent is rosined soap class air entrapment agent.
A cast-in-place concrete preparation method for building, comprises following preparation process:
1) material of following mass fraction is chosen: breeze, stone, aggregate, glass fibre, air entrapment agent and supplementary additive; Selected above component dropped in stirrer, uniform stirring 15-25min, obtains stirring thing;
2) cement is added in stirring thing, then uniform stirring 5-10min, obtains just step concrete;
3) be added into by water in first step concrete, then uniform stirring 5-10min, has stirred rear standing 10-15min, namely obtains cast-in-place concrete for building of the present invention.
The invention has the beneficial effects as follows: this concrete has evenly, stablize, close, mutual disconnected micro-bubble, avoid forming capillary channel in concrete, relax free water and freezed the produced swelling pressure, the concrete anti-freezing property of effective raising, can resist the fast freeze-thaw Circulation of 500 times.Glass fibre is disorderly and unsystematic distribution in concrete, and because concrete tensile strength is lower, the existence of glass fibre can assist concrete to bear tensile stress, transmit tensile stress, stops the expansion of macroscopic fracture, thus improves concrete toughness; Under freeze-thaw cycle effect, the existence of glass fibre can effectively improve concrete antistripping, separating power, reduces mass loss, and concrete preparation technology of the present invention is comparatively simple simultaneously, and preparation more for convenience, is adapted at comparatively cold place and promotes the use of.
Embodiment 1
1) material of following mass fraction is chosen: breeze 40 parts, 500 parts, stone, 1000 parts, aggregate, 2 parts, glass fibre, air entrapment agent 3 parts, supplementary additive 15 parts; Selected above component dropped in stirrer, uniform stirring 18min, obtains stirring thing;
2) cement 300 parts is added in stirring thing, then uniform stirring 7min, obtains just step concrete;
3) be added into by 600 parts, water in first step concrete, then uniform stirring 8min, has stirred rear standing 10min, namely obtains cast-in-place concrete for building of the present invention.
After tested, cast-in-place concrete for building of the present invention has evenly, stablize, close, mutual disconnected micro-bubble, avoid forming capillary channel in concrete, relax free water and freezed the produced swelling pressure, the concrete anti-freezing property of effective raising, can resist the fast freeze-thaw Circulation of 550 times.
Embodiment 2
1) material of following mass fraction is chosen: breeze 45 parts, 600 parts, stone, 1200 parts, aggregate, 3 parts, glass fibre, air entrapment agent 5 parts and supplementary additive 25 parts; Selected above component dropped in stirrer, uniform stirring 15-25min, obtains stirring thing;
2) cement 350 parts is added in stirring thing, then uniform stirring 10min, obtains just step concrete;
3) be added into by 700 parts, water in first step concrete, then uniform stirring 10min, has stirred rear standing 15min, namely obtains cast-in-place concrete for building of the present invention.
After tested, cast-in-place concrete for building of the present invention has evenly, stablize, close, mutual disconnected micro-bubble, avoid forming capillary channel in concrete, relax free water and freezed the produced swelling pressure, the concrete anti-freezing property of effective raising, can resist the fast freeze-thaw Circulation of 500 times.
Embodiment 3
1) material of following mass fraction is chosen: breeze 40 parts, 600 parts, stone, 1000 parts, aggregate, 3 parts, glass fibre, air entrapment agent 3 parts and supplementary additive 25 parts; Selected above component dropped in stirrer, uniform stirring 15min, obtains stirring thing;
2) cement 350 parts is added in stirring thing, then uniform stirring 5min, obtains just step concrete;
3) be added into by 700 parts, water in first step concrete, then uniform stirring 5min, has stirred rear standing 15min, namely obtains cast-in-place concrete for building of the present invention.
After tested, cast-in-place concrete for building of the present invention has evenly, stablize, close, mutual disconnected micro-bubble, avoid forming capillary channel in concrete, relax free water and freezed the produced swelling pressure, the concrete anti-freezing property of effective raising, can resist the fast freeze-thaw Circulation of 520 times.
Embodiment 4
1) material of following mass fraction is chosen: breeze 40 parts, 600 parts, stone, 1200 parts, aggregate, 2 parts, glass fibre, air entrapment agent 5 parts and supplementary additive 25 parts; Selected above component dropped in stirrer, uniform stirring 20min, obtains stirring thing;
2) cement 330 parts is added in stirring thing, then uniform stirring 8min, obtains just step concrete;
3) be added into by 600 parts, water in first step concrete, then uniform stirring 8min, has stirred rear standing 12min, namely obtains cast-in-place concrete for building of the present invention.
After tested, cast-in-place concrete for building of the present invention has evenly, stablize, close, mutual disconnected micro-bubble, avoid forming capillary channel in concrete, relax free water and freezed the produced swelling pressure, the concrete anti-freezing property of effective raising, can resist the fast freeze-thaw Circulation of 500 times.
Embodiment 5
1) material of following mass fraction is chosen: breeze 45 parts, 600 parts, stone, 1100 parts, aggregate, 3 parts, glass fibre, air entrapment agent-5 parts and supplementary additive 25 parts; Selected above component dropped in stirrer, uniform stirring 25min, obtains stirring thing;
2) cement 350 parts is added in stirring thing, then uniform stirring 10min, obtains just step concrete;
3) be added into by 600 parts, water in first step concrete, then uniform stirring 10min, has stirred rear standing 15min, namely obtains cast-in-place concrete for building of the present invention.
After tested, cast-in-place concrete for building of the present invention has evenly, stablize, close, mutual disconnected micro-bubble, avoid forming capillary channel in concrete, relax free water and freezed the produced swelling pressure, the concrete anti-freezing property of effective raising, can resist the fast freeze-thaw Circulation of 510 times.
More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. a cast-in-place concrete for building, is characterized in that: the material composition comprising following mass fraction:
Cement 300-350 part
Breeze 40-45 part
Stone 500-600 part
Aggregate 1000-1200 part
Glass fibre 2-3 part
Air entrapment agent 3-5 part
Supplementary additive 15-25 part
Water 600-700 part.
2. cast-in-place concrete for building according to claim 1, is characterized in that: the material composition comprising following mass fraction: cement 300 parts, breeze 40 parts, 500 parts, stone, 1000 parts, aggregate, 2 parts, glass fibre, air entrapment agent 3 parts, supplementary additive 15 parts, 600 parts, water.
3. cast-in-place concrete for building according to claim 1, is characterized in that: the material composition comprising following mass fraction: cement 350 parts, breeze 45 parts, 600 parts, stone, 1200 parts, aggregate, 3 parts, glass fibre, air entrapment agent 5 parts, supplementary additive 25 parts, 700 parts, water.
4. cast-in-place concrete for building according to claim 1, is characterized in that: the material composition comprising following mass fraction: cement 350 parts, breeze 40 parts, 600 parts, stone, 1000 parts, aggregate, 3 parts, glass fibre, air entrapment agent 3 parts, supplementary additive 25 parts, 700 parts, water.
5. cast-in-place concrete for building according to claim 1, is characterized in that: the material composition comprising following mass fraction: cement 330 parts, breeze 40 parts, 600 parts, stone, 1200 parts, aggregate, 2 parts, glass fibre, air entrapment agent 5 parts, supplementary additive 25 parts, 600 parts, water.
6. cast-in-place concrete for building according to claim 1, is characterized in that: the material composition comprising following mass fraction: cement 350 parts, breeze 45 parts, 600 parts, stone, 1100 parts, aggregate, 3 parts, glass fibre, air entrapment agent-5 parts, supplementary additive 25 parts, 600 parts, water.
7. cast-in-place concrete for building according to claim 1, is characterized in that: described cement is ordinary Portland cement.
8. cast-in-place concrete for building according to claim 1, is characterized in that: described air entrapment agent is rosined soap class air entrapment agent.
9. the concrete preparation method cast-in-place for building according to any one of claim 1 to 8, is characterized in that: comprise following preparation process:
Choose the material of following mass fraction: breeze, stone, aggregate, glass fibre, air entrapment agent and supplementary additive; Selected above component dropped in stirrer, uniform stirring 15-25min, obtains stirring thing;
Cement is added in stirring thing, then uniform stirring 5-10min, obtains just step concrete;
Be added into by water in first step concrete, then uniform stirring 5-10min, has stirred rear standing 10-15min, namely obtains cast-in-place concrete for building of the present invention.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510665206.0A CN105271995A (en) | 2015-10-16 | 2015-10-16 | Concrete for cast-in-place building and preparation method of concrete |
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| CN201510665206.0A CN105271995A (en) | 2015-10-16 | 2015-10-16 | Concrete for cast-in-place building and preparation method of concrete |
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| CN105271995A true CN105271995A (en) | 2016-01-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106699056A (en) * | 2016-12-19 | 2017-05-24 | 芜湖浩权建筑工程有限公司 | Building casting material concrete and preparation method thereof |
| CN107471431A (en) * | 2017-09-05 | 2017-12-15 | 山东电力基本建设总公司 | Extremely frigid zones concrete mixing casting method |
| CN108298886A (en) * | 2018-05-03 | 2018-07-20 | 南京御森建筑科技发展有限公司 | A kind of drought reinforced concrete and preparation method thereof |
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| CN101497533A (en) * | 2009-02-27 | 2009-08-05 | 中国科学院武汉岩土力学研究所 | Foam concrete and preparing process thereof |
| CN102910884A (en) * | 2012-10-19 | 2013-02-06 | 中国长江三峡集团公司 | Concrete composition and preparation method thereof |
| CN104072041A (en) * | 2014-06-27 | 2014-10-01 | 长安大学 | Impermeable anti-cracking concrete |
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2015
- 2015-10-16 CN CN201510665206.0A patent/CN105271995A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497533A (en) * | 2009-02-27 | 2009-08-05 | 中国科学院武汉岩土力学研究所 | Foam concrete and preparing process thereof |
| CN102910884A (en) * | 2012-10-19 | 2013-02-06 | 中国长江三峡集团公司 | Concrete composition and preparation method thereof |
| CN104072041A (en) * | 2014-06-27 | 2014-10-01 | 长安大学 | Impermeable anti-cracking concrete |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106699056A (en) * | 2016-12-19 | 2017-05-24 | 芜湖浩权建筑工程有限公司 | Building casting material concrete and preparation method thereof |
| CN107471431A (en) * | 2017-09-05 | 2017-12-15 | 山东电力基本建设总公司 | Extremely frigid zones concrete mixing casting method |
| CN108298886A (en) * | 2018-05-03 | 2018-07-20 | 南京御森建筑科技发展有限公司 | A kind of drought reinforced concrete and preparation method thereof |
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Application publication date: 20160127 |
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