CN103145378A - Expandable polystyrene (EPS) anti-cracking concrete and preparation method thereof - Google Patents
Expandable polystyrene (EPS) anti-cracking concrete and preparation method thereof Download PDFInfo
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- CN103145378A CN103145378A CN201310043587XA CN201310043587A CN103145378A CN 103145378 A CN103145378 A CN 103145378A CN 201310043587X A CN201310043587X A CN 201310043587XA CN 201310043587 A CN201310043587 A CN 201310043587A CN 103145378 A CN103145378 A CN 103145378A
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Abstract
The invention provides expandable polystyrene (EPS) anti-cracking concrete which is formed by the components by weight: cement 280-450 kg, mineral powder 40-100 kg, coal ash 30-110 kg, water 180-270 kg, river sand 110-150 kg, EPS particles 30-60 kg, perlite 30-70 kg, polymer emulsion 10-40 kg, ulex europaeus agglutinin (UEA) concrete expansion agent 50-70 kg, SP403 pumping aid 7-10 kg and grace fibers 0.9-1.5 kg. The EPS anti-cracking concrete solves the difficulty that the EPS particle cannot be bonded with the cement mortar well, and improves the mechanical properties of the concrete, prevents cracking, and has the advantages of being simple in preparation technological process, simple in maintenance process and easy to implement and low in demands for staff; the EPS anti-cracking concrete is beneficial to the recollection of waste materials and energy conservation, excellent in product performance, and great in economic value.
Description
Technical field
The present invention relates to a kind of method field of manufacturing of high strength anti-crack concrete for building, be specifically related to a kind of EPS anti-crack concrete and preparation method thereof.
Technical background
The EPS particle is the extraordinary material of a kind of heat-insulating property, but this material property also can be served problem to concrete belt: the density ratio water of coal ash cement mortar of the one, EPS particle is much smaller, EPS particle floating easily appears in stirring molding process, the material layering phenomenon; The 2nd, if the particle diameter of EPS particle is too large, cause the cement slurry relative deficiency, cause the concrete hole of EPS more.The factor of these two aspects has seriously reduced the concrete even compaction rate of EPS.The 3rd, EPS particle is a kind of organic materials, and its surface has lipophilicity, and cement is a kind of inorganic materials, and take ionic compound as main, thereby its surface group has strong water-absorbent.The distinct surface properties of this bi-material has caused its surface to be difficult to and combination.
Summary of the invention
The purpose of this invention is to provide a kind of EPS anti-crack concrete.
The present invention also provides a kind of preparation method of EPS anti-crack concrete.
The present invention is to provide a kind of EPS anti-crack concrete, this concrete includes the composition of following weight: cement 280-450kg, breeze 40-100kg, flyash 30-110kg, water 180-270kg, river sand 110-150kg, EPS particle 30-60kg, perlite 30-70kg, polymer emulsion 10-40kg, UEA cement expansive material 50-70kg, SP403 pumping agent 7-10kg and Grace fiber 0.9-1.5kg.
The silica flour that also comprises 0-15kg, and this concrete includes the composition of following weight: cement 290-480kg, breeze 50-110kg, flyash 35-115kg, water 185-280kg, river sand 120-160kg, EPS particle 40-66kg, perlite 35-75kg, polymer emulsion 15-45kg, UEA cement expansive material 55-78kg, SP403 pumping agent 8-12kg and Grace fiber 1-1.6kg.
The silica flour that also comprises 10-30kg, and this concrete includes the composition of following weight: cement 295-485kg, breeze 55-115kg, flyash 38-120kg, water 120-285kg, river sand 115-165kg, EPS particle 20-75kg, perlite 40-80kg, polymer emulsion 29-50kg, UEA cement expansive material 30-58kg, SP403 pumping agent 6-12kg and Grace fiber 0.6-1.1kg.
The silica flour that also comprises 40-60kg, and this concrete includes the composition of following weight: cement 195-385kg, breeze 45-95kg, flyash 50-1i0kg, water 110-295kg, river sand 125-185kg, EPS particle 40-85kg, perlite 20-60kg, polymer emulsion 35-60kg, UEA cement expansive material 40-60kg, SP403 pumping agent 8-13kg and Grace fiber 0.7-1.3kg.
As preferably, described polymer emulsion is polyaminoester emulsion, and described polymer emulsion solid content is 45-55%, and viscosity is 1.5-4.0Pa.s, and the Ph value is 5-6.
As preferably, the bulk density of described EPS particle is 10～20kg/m
3
As preferably, described perlite is pearlstone, and described perlite density is 2.2～2.4g/cm
3, refractoriness is 1300～1380 ℃, expansion multiple is 4～25 times.
A kind ofly prepare described EPS anti-crack concrete method as any in claim 1-4, its improvements are that described method comprises the steps:
1) make shell
Add the first forced mixer to stir into pasty state together with a small amount of water, cement, UEA cement expansive material, SP403 pumping agent, Grace fiber, breeze, silica flour and flyash polyaminoester emulsion;
Drop into the EPS particle and stir 10-15s to the first forced mixer, make the EPS particle surface hang with the uniform cement mixing mortar of skim;
Standing 1-2 days, make the grout that is mixed with polyaminoester emulsion condense, harden and produce certain intensity at the EPS particle surface;
2) wrap up in slurry
Add the second forced mixer to stir 5-20s in river sand, perlite and remaining water, cement, UEA cement expansive material, SP403 pumping agent, Grace fiber, breeze, silica flour and flyash, obtain the cement mixing mineral mortar;
The cement mixing mineral mortar is transferred in the first forced mixer that is placed with the cement mixing mortar after standing, must be wrapped with the aggregate of cement mixing mineral ash material;
3) batch mixing
The aggregate that is wrapped with cement mixing mineral ash material is stirred 20-45s in the first forced mixer, get the concrete that evenly is mixed with EPS;
4) moulding
The concrete that obtains in step 3 is transferred in the mould that is positioned on shaking table, covered and flat board is exerted pressure with dull and stereotyped at the mould upper surface, control shaking table and make dull and stereotyped and mould resonance 3-30s.After vibration finishes, flat board is extracted out along the material plane;
Wherein, vibrational frequency is 2900 times/min, and amplitude is 0.3-0.8mm;
5) maintenance
Curing in the mold 2-5 days;
Wherein, the curing in the mold temperature is 20-35 ℃, and maintain humidity is 75-100%;
The demoulding with the concrete rear pad pasting that waters, was carried out natural curing 25-30 days;
Wherein, the pad pasting curing temperature is 20-35 ℃, and maintain humidity is 75-100%;
Owing to having adopted technique scheme, compared with prior art, beneficial effect of the present invention comprises:
1) the EPS particle is a kind of organic materials, and its surface has lipophilicity, and cement is a kind of inorganic materials, and take ionic compound as main, thereby its surface group has strong water-absorbent.The distinct surface properties of this bi-material has caused its surface to be difficult to and combination; The measure of adopting the appeal technical scheme to solve interface adhesion can solve the bonding bad difficult problem of EPS particle and sand-cement slurry, and then improve this concrete mechanical property, prevents cracking;
2) preparation technology's flow process of EPS anti-crack concrete of the present invention is simple, and maintaining process is simple easily to be implemented, and has reduced the requirement to the staff;
3) the present invention is a kind of green technology scheme, is conducive to the saving with the energy of being beneficial to of rejected material, and excellent product performance, has larger economic worth.
Action principle:
Because EPS particle capacity is very little, easily float in the concrete-agitating moulding process, laminated segregation occurs, be difficult to form concrete uniformly densely.The present invention adopts low water-cement ratio pressurization and vibration moulding process, by controlling time of vibration and frequency, the EPS uniform particles is distributed in the EPS anti-crack concrete, mixes simultaneously pearlstone the delamination degree of EPS particle is further reduced.
The UEA cement expansive material can be offset the shrinkage that forms in course of hardening, thereby reduces desciccation crack, improves concrete cracking resistance and anti-permeability performance; The SP403 pumping agent can play lubrication to concrete, makes pumpability good; The Grace fiber can play anti-crack function to concrete, and concrete crushing strength and axial tensile strength are met the demands, and prevents the cracking phenomena in Overlong Concrete Structure.
After flyash mixes the EPS anti-crack concrete, can structure and the performance of EPS anti-crack concrete be exerted an influence, contain a large amount of glass microballons in flyash, particle shape is complete, and therefore smooth surface can improve the workability of EPS anti-crack concrete significantly; And density can make slurry volume increase in the EPS anti-crack concrete, so flyash can be improved the workability of EPS anti-crack concrete significantly all less than cement granules.
Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.
Embodiment 1:
The composition of choosing concrete weight in this example is: cement 285kg, breeze 50kg, flyash 55kg, water 200kg, river sand 125kg, EPS particle 38kg, perlite 58kg, polymer emulsion 35kg, UEA cement expansive material 65kg, SP403 pumping agent 9kg and Grace fiber 1.4kg.
The bulk density of EPS particle is 15kg/m
3
Perlite density is 2.2g/cm
3, refractoriness is 1380 ℃, expansion multiple is 15 times.
Preparation technology:
Make shell
Add the first forced mixer to stir into pasty state together with a small amount of water, cement, UEA cement expansive material, SP403 pumping agent, Grace fiber, breeze, silica flour and flyash polyaminoester emulsion;
Drop into the EPS particle and stir 10s to the first forced mixer, make the EPS particle surface hang with the uniform cement mixing mortar of skim;
Standing 1 day, make the grout that is mixed with polyaminoester emulsion condense, harden and produce certain intensity at the EPS particle surface;
Wrap up in slurry
Add the second forced mixer to stir 15s in river sand, perlite and remaining water, cement, UEA cement expansive material, SP403 pumping agent, Grace fiber, breeze, silica flour and flyash, obtain the cement mixing mineral mortar;
The cement mixing mineral mortar is transferred in the first forced mixer that is placed with the cement mixing mortar after standing, must be wrapped with the aggregate of cement mixing mineral ash material;
Batch mixing
The aggregate that is wrapped with cement mixing mineral ash material is stirred 35s in the first forced mixer, get the concrete that evenly is mixed with EPS;
Moulding
The concrete that obtains in step 3 is transferred in the mould that is positioned on shaking table, covered and flat board is exerted pressure with dull and stereotyped at the mould upper surface, control shaking table and make dull and stereotyped and mould resonance 5s.After vibration finishes, flat board is extracted out along the material plane;
Wherein, vibrational frequency is 2900 times/min, and amplitude is 0.5mm;
Maintenance
Curing in the mold 3 days;
Wherein, the curing in the mold temperature is 30 ℃, and maintain humidity is 80%;
The demoulding with the concrete rear pad pasting that waters, was carried out natural curing 25 days;
Wherein, the pad pasting curing temperature is 30 ℃, and maintain humidity is 75%;
Embodiment 2:
The composition of choosing concrete weight in this example is: silica flour 10kg, cement 350kg, breeze 60kg, flyash 45kg, water 250kg, river sand 128kg, EPS particle 55kg, perlite 55kg, polymer emulsion 30kg, UEA cement expansive material 65kg, SP403 pumping agent 10kg and Grace fiber 1kg.
The bulk density of EPS particle is 18kg/m
3
Perlite density is 2.3g/cm
3, refractoriness is 1350 ℃, expansion multiple is 30 times.
Preparation technology:
Make shell
Add the first forced mixer to stir into pasty state together with a small amount of water, cement, UEA cement expansive material, SP403 pumping agent, Grace fiber, breeze, silica flour and flyash polyaminoester emulsion;
Drop into the EPS particle and stir 12s to the first forced mixer, make the EPS particle surface hang with the uniform cement mixing mortar of skim;
Standing 2 days, make the grout that is mixed with polyaminoester emulsion condense, harden and produce certain intensity at the EPS particle surface;
Wrap up in slurry
Add the second forced mixer to stir 15s in river sand, perlite and remaining water, cement, UEA cement expansive material, SP403 pumping agent, Grace fiber, breeze, silica flour and flyash, obtain the cement mixing mineral mortar;
The cement mixing mineral mortar is transferred in the first forced mixer that is placed with the cement mixing mortar after standing, must be wrapped with the aggregate of cement mixing mineral ash material;
Batch mixing
The aggregate that is wrapped with cement mixing mineral ash material is stirred 40s in the first forced mixer, get the concrete that evenly is mixed with EPS;
Moulding
The concrete that obtains in step 3 is transferred in the mould that is positioned on shaking table, covered and flat board is exerted pressure with dull and stereotyped at the mould upper surface, control shaking table and make dull and stereotyped and mould resonance 25s.After vibration finishes, flat board is extracted out along the material plane;
Wherein, vibrational frequency is 2900 times/min, and amplitude is 0,7mm;
Maintenance
Curing in the mold 2-5 days;
Wherein, the curing in the mold temperature is 25 ℃, and maintain humidity is 95%;
The demoulding with the concrete rear pad pasting that waters, was carried out natural curing 30 days;
Wherein, the pad pasting curing temperature is 25 ℃, and maintain humidity is 95%;
Table 1 item has provided the tensile strength properties of the EPS anti-crack concrete in embodiment 1 and embodiment 2:
Table 1
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can to some modifications or improvement, this will be apparent to those skilled in the art.Therefore, these modifications or improvements, all belong to the claimed scope of invention without departing from theon the basis of the spirit of the present invention.
Claims (8)
1. EPS anti-crack concrete, it is characterized in that: this concrete includes the composition of following weight: cement 280-450kg, breeze 40-100kg, flyash 30-110kg, water 180-270kg, river sand 110-150kg, EPS particle 30-60kg, perlite 30-70kg, polymer emulsion 10-40kg, UEA cement expansive material 50-70kg, SP403 pumping agent 7-10kg and Grace fiber 0.9-1.5kg.
2. EPS anti-crack concrete according to claim 1, it is characterized in that: also comprise the silica flour of 0-15kg, and this concrete includes the composition of following weight: cement 290-480kg, breeze 50-110kg, flyash 35-115kg, water 185-280kg, river sand 120-160kg, EPS particle 40-66kg, perlite 35-75kg, polymer emulsion 15-45kg, UEA cement expansive material 55-78kg, SP403 pumping agent 8-12kg and Grace fiber 1-1.6kg.
3. EPS anti-crack concrete according to claim 1, it is characterized in that: also comprise the silica flour of 10-30kg, and this concrete includes the composition of following weight: cement 295-485kg, breeze 55-115kg, flyash 38-120kg, water 120-285kg, river sand 115-165kg, EPS particle 20-75kg, perlite 40-80kg, polymer emulsion 29-50kg, UEA cement expansive material 30-58kg, SP403 pumping agent 6-12kg and Grace fiber 0.6-1.1kg.
4. EPS anti-crack concrete according to claim 1, it is characterized in that: also comprise the silica flour of 40-60kg, and this concrete includes the composition of following weight: cement 195-385kg, breeze 45-95kg, flyash 50-110kg, water 110-295kg, river sand 125-185kg, EPS particle 40-85kg, perlite 20-60kg, polymer emulsion 35-60kg, UEA cement expansive material 40-60kg, SP403 pumping agent 8-13kg and Grace fiber 0.7-1.3kg.
5. according to claim 1-4 any described EPS anti-crack concretes, it is characterized in that: described polymer emulsion is polyaminoester emulsion, and described polymer emulsion solid content is 45-55%, and viscosity is 1.5-4.0Pa.s, and the Ph value is 5-6.
6. according to claim 1-4 any described EPS anti-crack concretes, is characterized in that: described EPS particle
Bulk density be 10～20kg/m
3
7. according to claim 1-4 any described EPS anti-crack concretes, it is characterized in that: described perlite is pearlstone, described perlite density is 2.2～2.4g/cm
3, refractoriness is 1300～1380 ℃, expansion multiple is 4～25 times.
8. one kind prepares described EPS anti-crack concrete method as any in claim 1-4, and it is characterized in that: the method comprises the following steps:
1) make shell
Add the first forced mixer to stir into pasty state together with a small amount of water, cement, UEA cement expansive material, SP403 pumping agent, Grace fiber, breeze, silica flour and flyash polyaminoester emulsion; Drop into the EPS particle and stir 10-15s to the first forced mixer, make the EPS particle surface hang with the uniform cement mixing mortar of skim;
Standing 1-2 days, make the grout that is mixed with polyaminoester emulsion condense, harden and produce certain intensity at the EPS particle surface;
2) wrap up in slurry
Add the second forced mixer to stir 5-20s in river sand, perlite and remaining water, cement, UEA cement expansive material, SP403 pumping agent, Grace fiber, breeze, silica flour and flyash, obtain the cement mixing mineral mortar;
The cement mixing mineral mortar is transferred in the first forced mixer that is placed with the cement mixing mortar after standing, must be wrapped with the aggregate of cement mixing mineral ash material;
3) batch mixing
The aggregate that is wrapped with cement mixing mineral ash material is stirred 20-45s in the first forced mixer, get the concrete that evenly is mixed with EPS;
4) moulding
The concrete that obtains in step 3 is transferred in the mould that is positioned on shaking table, covered and flat board is exerted pressure with dull and stereotyped at the mould upper surface, control shaking table and make dull and stereotyped and mould resonance 3-30s.After vibration finishes, flat board is extracted out along the material plane;
Wherein, vibrational frequency is 2900 times/min, and amplitude is 0.3-0.8mm;
5) maintenance
Curing in the mold 2-5 days;
Wherein, the curing in the mold temperature is 20-35 ℃, and maintain humidity is 75-100%;
The demoulding with the concrete rear pad pasting that waters, was carried out natural curing 25-30 days;
Wherein, the pad pasting curing temperature is 20-35 ℃, and maintain humidity is 75-100%.
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| CN201310043587XA CN103145378A (en) | 2013-01-28 | 2013-01-28 | Expandable polystyrene (EPS) anti-cracking concrete and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553513A (en) * | 2013-10-09 | 2014-02-05 | 南京工业大学 | Control method for cracking of foam concrete pouring body |
| CN106316244A (en) * | 2016-08-08 | 2017-01-11 | 冯乃谦 | Manufacturing method of artificial lightweight aggregate or super lightweight aggregate multifunctional concrete |
| CN113354355A (en) * | 2021-06-04 | 2021-09-07 | 佛山科学技术学院 | Preparation method of novel POM fiber EPS composite ultra-light concrete material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186471A (en) * | 2007-12-14 | 2008-05-28 | 中天建设集团有限公司 | Concrete |
| CN102643055A (en) * | 2012-04-06 | 2012-08-22 | 中国电力科学研究院 | EPS (Expandable Polystyrene) lightweight aggregate concrete and preparation method thereof |
-
2013
- 2013-01-28 CN CN201310043587XA patent/CN103145378A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186471A (en) * | 2007-12-14 | 2008-05-28 | 中天建设集团有限公司 | Concrete |
| CN102643055A (en) * | 2012-04-06 | 2012-08-22 | 中国电力科学研究院 | EPS (Expandable Polystyrene) lightweight aggregate concrete and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553513A (en) * | 2013-10-09 | 2014-02-05 | 南京工业大学 | Control method for cracking of foam concrete pouring body |
| CN103553513B (en) * | 2013-10-09 | 2015-09-02 | 南京工业大学 | Control method for cracking of foam concrete pouring body |
| CN106316244A (en) * | 2016-08-08 | 2017-01-11 | 冯乃谦 | Manufacturing method of artificial lightweight aggregate or super lightweight aggregate multifunctional concrete |
| CN106316244B (en) * | 2016-08-08 | 2018-05-18 | 冯乃谦 | A kind of manufacturing method of artificial lightweight aggregate or super light aggregate multifunctional concrete |
| CN113354355A (en) * | 2021-06-04 | 2021-09-07 | 佛山科学技术学院 | Preparation method of novel POM fiber EPS composite ultra-light concrete material |
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