CN114276095A - Formula of high-hardness pouring type gypsum template - Google Patents
Formula of high-hardness pouring type gypsum template Download PDFInfo
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- CN114276095A CN114276095A CN202111532943.5A CN202111532943A CN114276095A CN 114276095 A CN114276095 A CN 114276095A CN 202111532943 A CN202111532943 A CN 202111532943A CN 114276095 A CN114276095 A CN 114276095A
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 50
- 239000010440 gypsum Substances 0.000 title claims abstract description 50
- 239000000835 fiber Substances 0.000 claims abstract description 114
- 238000005452 bending Methods 0.000 claims abstract description 47
- 239000004568 cement Substances 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 13
- 239000000839 emulsion Substances 0.000 claims abstract description 13
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002253 acid Substances 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 73
- 238000003756 stirring Methods 0.000 claims description 36
- 239000004570 mortar (masonry) Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 12
- 229920005646 polycarboxylate Polymers 0.000 claims description 6
- 239000008030 superplasticizer Substances 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 6
- 238000009472 formulation Methods 0.000 claims 3
- 239000000203 mixture Substances 0.000 claims 3
- 238000002156 mixing Methods 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 3
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 3
- 210000001170 unmyelinated nerve fiber Anatomy 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a high-hardness pouring type gypsum template formula in the technical field of gypsum, which comprises the following materials in parts by weight: 42.5 parts of sulpho-aluminous cement; 1 part of common river sand; 0.0016 part of a polycarboxylic acid water reducing agent; 0.128 part of pure acrylic polymer emulsion; 0.00128 part of liquid defoaming agent; 0-0.14 part of recycled fiber. According to the invention, different types of recycled fibers are doped, the fibers have crack resistance, the cracking of the cement-based material can be delayed, the micro-crack expansion can be prevented, the toughness of the cement-based material can be improved by four types of fibers, the toughness and the bending resistance of the cement-based material can be improved by the recycled fiber A and the recycled fiber B, the lifting range of the fiber A is large, the effect of the recycled fiber O and the recycled fiber C on improving the bending resistance of the cement-based material is general, but the toughness of the cement-based material can be improved, and the optimal mixing amounts of the recycled fiber O, the recycled fiber A, the recycled fiber B and the recycled fiber C are respectively 4%, 8% and 4%.
Description
Technical Field
The invention relates to the technical field of gypsum, in particular to a high-hardness pouring type gypsum template formula.
Background
Gypsum is a monoclinic mineral and is a hydrate of calcium sulfate (CaSO4) as a main chemical component, and is an industrial material and a building material with wide application, and can be used for cement retarders, gypsum building products, model making, medical food additives, sulfuric acid production, paper fillers, paint fillers and the like.
In a Chinese patent with an issued publication number of CN105731959B, a haze-removing paper-surface gypsum board is provided, physical property characteristics of raw materials are utilized and combined with each other to realize adsorption and removal of haze molecules, and crack-resistant materials are not added to the gypsum board in the patent, so that the bending resistance and crack resistance of a cement-based material are difficult to improve, and the toughness of the cement-based material is difficult to improve.
Disclosure of Invention
Aiming at the problems, the invention provides a high-hardness pouring type gypsum template formula which has the advantages of delaying the cracking of a cement-based material, preventing the micro-crack from expanding and improving the toughness of the cement-based material.
The technical scheme of the invention is as follows:
the formula of the high-hardness pouring type gypsum template comprises the following materials in parts by weight:
42.5 parts of sulpho-aluminous cement;
1 part of common river sand;
0.0016 part of a polycarboxylic acid water reducing agent;
0.128 part of pure acrylic polymer emulsion;
0.00128 part of liquid defoaming agent;
0-0.14 part of recycled fiber.
In a further technical scheme, the recycled fiber adopts any one of recycled fiber A, recycled fiber B, recycled fiber C and recycled fiber O.
In a further technical scheme, the recycled fiber A is 1mm in diameter, the recycled fiber B is 2mm in diameter, the recycled fiber C is 3mm in diameter, and the recycled fiber O is 0.5mm in diameter.
In a further technical scheme, the maximum particle size of the common river sand is less than 2.16 mm.
In a further technical scheme, the polycarboxylate superplasticizer is powder.
In a further technical scheme, the mortar-to-mortar ratio of the high-hardness pouring type gypsum template formula is 1:1, the aggregate-cement ratio of the high-hardness pouring type gypsum template formula is 6%, and the water-cement ratio of the high-hardness pouring type gypsum template formula is 0.248.
In a further technical scheme, the experimental cement and the common river sand need to be placed in a dry-curing room (the temperature is 20 +/-1 ℃) for 24 hours in advance.
In a further technical scheme, the temperature of the dry and empty curing chamber is kept at 20 +/-1 ℃, and the humidity is kept at about 60%.
In a further technical scheme, the formula of the high-hardness pouring type gypsum template comprises the following test piece test methods:
s1, putting the weighed liquid (pure acrylic polymer emulsion and liquid defoaming agent) into a stirring pot, uniformly stirring by using a stirring rod, uniformly premixing the weighed powder, putting into the stirring pot, slowly stirring for 2min, and testing the fluidity of the mortar after stopping stirring;
s2, carrying out a fluidity test of the mortar according to JC/T986-;
s3, guiding the uniformly stirred mortar into a mold, vibrating for 1min, leveling the surface, placing the molded test piece mold into a standard curing room for 24h, removing the mold, numbering, curing for 6d under a dry condition, and testing the bending resistance (standard curing for 1d, dry curing for 6 d);
and S4, firstly, measuring the thickness and the width of each group of (6) test pieces by using a vernier caliper, inputting corresponding software programs, and then, sequentially testing the bending resistance to obtain a test force-axial deformation curve of the test pieces, wherein the load corresponding to the highest point of the curve is the maximum force, namely the breaking load (Pm).
The invention has the beneficial effects that:
1. the recycled fibers have crack resistance, so that the cracking of the cement-based material can be delayed, the expansion of microcracks can be prevented, and the four fibers can improve the toughness of the cement-based material;
2. the recycled fiber A (1mm) and the recycled fiber B (2mm) can improve the toughness and the bending resistance of the cement-based material, the lifting range of the fiber A (1mm) is large, and the recycled fiber O (0.5mm) and the recycled fiber C (3mm) have a common effect of improving the bending resistance of the cement-based material, but can improve the toughness of the cement-based material;
3. the bending strength, the workability (fluidity) and the economical efficiency are comprehensively considered: the optimum mixing amounts of the recycled fiber O (0.5mm), the recycled fiber A (1mm), the recycled fiber B (2mm) and the recycled fiber C (3mm) are respectively 4%, 8% and 4%.
Drawings
FIG. 1 is a graph comparing the recycled fiber A loading of example 1 of the present invention;
FIG. 2 is a comparison graph of the bending strength of recycled fiber A of example 1 of the present invention;
FIG. 3 is a graph comparing the amount of recycled fiber B in example 2 of the present invention;
FIG. 4 is a graph comparing the bending strength of recycled fiber B of example 2 of the present invention;
FIG. 5 is a graph comparing the amount of recycled fiber C incorporated in example 3 of the present invention;
FIG. 6 is a comparison graph of the bending strength of recycled fiber C of example 3 of the present invention;
FIG. 7 is a graph comparing the amount of recycled fiber O in example 4 of the present invention;
FIG. 8 is a graph comparing the bending strength of the recycled fiber O of example 4 of the present invention.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-2, a high-hardness pouring type gypsum template formula comprises the following materials in parts by weight:
42.5 parts of sulpho-aluminous cement;
1 part of common river sand;
0.0016 part of a polycarboxylic acid water reducing agent;
0.128 part of pure acrylic polymer emulsion;
0.00128 part of liquid defoaming agent;
and recovered fiber A0-0.14 part.
The recycled fiber is any one of recycled fiber A, recycled fiber B, recycled fiber C and recycled fiber O.
The recycled fiber A is 1mm in diameter, the recycled fiber B is 2mm in diameter, the recycled fiber C is 3mm in diameter, and the recycled fiber O is 0.5mm in diameter.
The maximum grain size of the common river sand is less than 2.16 mm.
The polycarboxylate superplasticizer is powder.
The glue-sand ratio of the formula of the high-hardness pouring type gypsum template is 1:1, the poly-ash ratio of the formula of the high-hardness pouring type gypsum template is 6%, and the water-cement ratio of the formula of the high-hardness pouring type gypsum template is 0.248.
The experimental cement and the ordinary river sand need to be placed in a dry-curing room (the temperature is 20 +/-1 ℃) for 24 hours in advance.
The temperature of the dry air curing chamber is kept at 20 +/-1 ℃, and the humidity is kept at about 60%.
The formula of the high-hardness pouring type gypsum template comprises the following test piece test methods:
s1, putting the weighed liquid (pure acrylic polymer emulsion and liquid defoaming agent) into a stirring pot, uniformly stirring by using a stirring rod, uniformly premixing the weighed powder, putting into the stirring pot, slowly stirring for 2min, and testing the fluidity of the mortar after stopping stirring;
s2, carrying out a fluidity test of the mortar according to JC/T986-;
s3, guiding the uniformly stirred mortar into a mold, vibrating for 1min, leveling the surface, placing the molded test piece mold into a standard curing room for 24h, removing the mold, numbering, curing for 6d under a dry condition, and testing the bending resistance (standard curing for 1d, dry curing for 6 d);
and S4, firstly, measuring the thickness and the width of each group of (6) test pieces by using a vernier caliper, inputting corresponding software programs, and then, sequentially testing the bending resistance to obtain a test force-axial deformation curve of the test pieces, wherein the load corresponding to the highest point of the curve is the maximum force, namely the breaking load (Pm).
In the embodiment, the recycled fiber A is doped, the bending strength of the test piece generally shows a trend that the bending strength of the test piece is increased firstly and then reduced and then tends to be flat and unchanged along with the increase of the doping amount of the recycled fiber A (1mm), and when the doping amount of the recycled fiber A (1mm) is 4 percent (namely 0.04 part), the bending strength of the test piece is 11.9MPa at most and is improved by 8 percent compared with the bending strength of the test piece without the fiber; when the mixing amount is more than 4 percent (namely more than 0.04 part), the bending strength of the test piece is reduced and tends to be gentle, the bending strength is maintained at 11.6MPa and is still improved by 5 percent compared with the bending strength of the test piece without the fiber, the recycled fiber A (1mm) can improve the toughness and the bending resistance of the cement-based material, the mixing amount of 4 percent (namely 0.04 part) is good, and the bending resistance of the cement-based material is not obviously improved by the recycled fiber A (1mm) with large mixing amount.
Example 2:
as shown in fig. 3-4, a high-hardness pouring type gypsum template formula comprises the following materials in parts by weight:
42.5 parts of sulpho-aluminous cement;
1 part of common river sand;
0.0016 part of a polycarboxylic acid water reducing agent;
0.128 part of pure acrylic polymer emulsion;
0.00128 part of liquid defoaming agent;
recovered fiber B0-0.14 portion.
The recycled fiber is any one of recycled fiber A, recycled fiber B, recycled fiber C and recycled fiber O.
The recycled fiber A is 1mm in diameter, the recycled fiber B is 2mm in diameter, the recycled fiber C is 3mm in diameter, and the recycled fiber O is 0.5mm in diameter.
The maximum grain size of the common river sand is less than 2.16 mm.
The polycarboxylate superplasticizer is powder.
The glue-sand ratio of the formula of the high-hardness pouring type gypsum template is 1:1, the poly-ash ratio of the formula of the high-hardness pouring type gypsum template is 6%, and the water-cement ratio of the formula of the high-hardness pouring type gypsum template is 0.248.
The experimental cement and the ordinary river sand need to be placed in a dry-curing room (the temperature is 20 +/-1 ℃) for 24 hours in advance.
The temperature of the dry air curing chamber is kept at 20 +/-1 ℃, and the humidity is kept at about 60%.
The formula of the high-hardness pouring type gypsum template comprises the following test piece test methods:
s1, putting the weighed liquid (pure acrylic polymer emulsion and liquid defoaming agent) into a stirring pot, uniformly stirring by using a stirring rod, uniformly premixing the weighed powder, putting into the stirring pot, slowly stirring for 2min, and testing the fluidity of the mortar after stopping stirring;
s2, carrying out a fluidity test of the mortar according to JC/T986-;
s3, guiding the uniformly stirred mortar into a mold, vibrating for 1min, leveling the surface, placing the molded test piece mold into a standard curing room for 24h, removing the mold, numbering, curing for 6d under a dry condition, and testing the bending resistance (standard curing for 1d, dry curing for 6 d);
and S4, firstly, measuring the thickness and the width of each group of (6) test pieces by using a vernier caliper, inputting corresponding software programs, and then, sequentially testing the bending resistance to obtain a test force-axial deformation curve of the test pieces, wherein the load corresponding to the highest point of the curve is the maximum force, namely the breaking load (Pm).
In this example, the bending strength of the test piece doped with recycled fiber B (2mm) was higher than that of the test piece not doped with recycled fiber B, and the bending strength of the test piece was approximately the same when the recycled fiber B was doped in an amount of 2% to 8% (i.e., 0.02 to 0.08 parts); when the content of the recycled fiber B is more than 10 percent (namely 0.1 part), the bending strength of the test piece is gradually increased, the amplification is obvious (probably because the water-cement ratio of a cement matrix is reduced and the bending strength of the matrix is enhanced due to the fact that the surface of the fiber absorbs water), and the toughness and the bending resistance of the cement-based material can be improved by the recycled fiber B (2 mm).
Example 3:
as shown in fig. 5-6, a high-hardness pouring type gypsum template formula comprises the following materials in parts by weight:
42.5 parts of sulpho-aluminous cement;
1 part of common river sand;
0.0016 part of a polycarboxylic acid water reducing agent;
0.128 part of pure acrylic polymer emulsion;
0.00128 part of liquid defoaming agent;
and recovered fiber C0-0.14 part.
The recycled fiber is any one of recycled fiber A, recycled fiber B, recycled fiber C and recycled fiber O.
The recycled fiber A is 1mm in diameter, the recycled fiber B is 2mm in diameter, the recycled fiber C is 3mm in diameter, and the recycled fiber O is 0.5mm in diameter.
The maximum grain size of the common river sand is less than 2.16 mm.
The polycarboxylate superplasticizer is powder.
The glue-sand ratio of the formula of the high-hardness pouring type gypsum template is 1:1, the poly-ash ratio of the formula of the high-hardness pouring type gypsum template is 6%, and the water-cement ratio of the formula of the high-hardness pouring type gypsum template is 0.248.
The experimental cement and the ordinary river sand need to be placed in a dry-curing room (the temperature is 20 +/-1 ℃) for 24 hours in advance.
The temperature of the dry air curing chamber is kept at 20 +/-1 ℃, and the humidity is kept at about 60%.
The formula of the high-hardness pouring type gypsum template comprises the following test piece test methods:
s1, putting the weighed liquid (pure acrylic polymer emulsion and liquid defoaming agent) into a stirring pot, uniformly stirring by using a stirring rod, uniformly premixing the weighed powder, putting into the stirring pot, slowly stirring for 2min, and testing the fluidity of the mortar after stopping stirring;
s2, carrying out a fluidity test of the mortar according to JC/T986-;
s3, guiding the uniformly stirred mortar into a mold, vibrating for 1min, leveling the surface, placing the molded test piece mold into a standard curing room for 24h, removing the mold, numbering, curing for 6d under a dry condition, and testing the bending resistance (standard curing for 1d, dry curing for 6 d);
and S4, firstly, measuring the thickness and the width of each group of (6) test pieces by using a vernier caliper, inputting corresponding software programs, and then, sequentially testing the bending resistance to obtain a test force-axial deformation curve of the test pieces, wherein the load corresponding to the highest point of the curve is the maximum force, namely the breaking load (Pm).
In this example, when the recycled fiber C is blended, and the blending amount of the recycled fiber C (3mm) is 2% -8% (i.e. 0.02-0.08 parts), the bending strength of the test pieces is slightly lower than that of the test pieces without blending, and the bending strength of each test piece is approximately the same; when the content of the C fiber is more than 10 percent (namely 0.1 part), the bending strength of the test piece is higher than that of the test piece without the C fiber, and the bending strength is increased more obviously when the content of the C fiber is larger (probably because the water-cement ratio of the cement matrix is reduced and the bending strength of the matrix is enhanced due to the fact that the surface of the fiber absorbs water).
Example 4:
as shown in fig. 7-8, a high hardness cast gypsum template formula comprises the following materials in parts by weight:
42.5 parts of sulpho-aluminous cement;
1 part of common river sand;
0.0016 part of a polycarboxylic acid water reducing agent;
0.128 part of pure acrylic polymer emulsion;
0.00128 part of liquid defoaming agent;
and 0.14-0.78 part of recycled fiber O0.
The recycled fiber is any one of recycled fiber A, recycled fiber B, recycled fiber C and recycled fiber O.
The recycled fiber A is 1mm in diameter, the recycled fiber B is 2mm in diameter, the recycled fiber C is 3mm in diameter, and the recycled fiber O is 0.5mm in diameter.
The maximum grain size of the common river sand is less than 2.16 mm.
The polycarboxylate superplasticizer is powder.
The glue-sand ratio of the formula of the high-hardness pouring type gypsum template is 1:1, the poly-ash ratio of the formula of the high-hardness pouring type gypsum template is 6%, and the water-cement ratio of the formula of the high-hardness pouring type gypsum template is 0.248.
The experimental cement and the ordinary river sand need to be placed in a dry-curing room (the temperature is 20 +/-1 ℃) for 24 hours in advance.
The temperature of the dry air curing chamber is kept at 20 +/-1 ℃, and the humidity is kept at about 60%.
The formula of the high-hardness pouring type gypsum template comprises the following test piece test methods:
s1, putting the weighed liquid (pure acrylic polymer emulsion and liquid defoaming agent) into a stirring pot, uniformly stirring by using a stirring rod, uniformly premixing the weighed powder, putting into the stirring pot, slowly stirring for 2min, and testing the fluidity of the mortar after stopping stirring;
s2, carrying out a fluidity test of the mortar according to JC/T986-;
s3, guiding the uniformly stirred mortar into a mold, vibrating for 1min, leveling the surface, placing the molded test piece mold into a standard curing room for 24h, removing the mold, numbering, curing for 6d under a dry condition, and testing the bending resistance (standard curing for 1d, dry curing for 6 d);
and S4, firstly, measuring the thickness and the width of each group of (6) test pieces by using a vernier caliper, inputting corresponding software programs, and then, sequentially testing the bending resistance to obtain a test force-axial deformation curve of the test pieces, wherein the load corresponding to the highest point of the curve is the maximum force, namely the breaking load (Pm).
In this example, the recycled fiber O is added, and the bending strength of the test piece is gradually improved as the adding amount of the recycled fiber O (0.5mm) is increased; the content of the recycled fiber O is 0-4% (namely 0-0.04 part), and the bending strength is greatly improved; the content of the recycled fiber O is 4-8% (namely 0.04-0.08 part), and the bending strength of the test piece is improved to a small extent; the content of the recycled fiber O is 8-10% (namely 0.08-0.1 part), the bending strength of the test piece is improved, and the bending strength of the test piece is increased (probably because the water-cement ratio of the cement matrix is reduced due to the water absorption of the fiber surface, and the bending strength of the matrix is enhanced.
The above examples 1 to 4 were all tested by the fixed water cement ratio method.
The above examples only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. A formula of a high-hardness pouring type gypsum template comprises the following components: the formula of the high-hardness pouring type gypsum template comprises the following materials in parts by weight:
42.5 parts of sulpho-aluminous cement;
1 part of common river sand;
0.0016 part of a polycarboxylic acid water reducing agent;
0.128 part of pure acrylic polymer emulsion;
0.00128 part of liquid defoaming agent;
0-0.14 part of recycled fiber.
2. The high-hardness cast gypsum template formula according to claim 1, wherein: the recycled fiber is any one of recycled fiber A, recycled fiber B, recycled fiber C and recycled fiber O.
3. The high hardness cast gypsum template formulation according to claim 2, wherein: the recycled fiber A is 1mm in diameter, the recycled fiber B is 2mm in diameter, the recycled fiber C is 3mm in diameter, and the recycled fiber O is 0.5mm in diameter.
4. The high-hardness cast gypsum template formula according to claim 3, wherein: the maximum grain size of the common river sand is less than 2.16 mm.
5. The high-hardness cast gypsum template formula according to claim 4, wherein: the polycarboxylate superplasticizer is powder.
6. The high-hardness cast gypsum template formula according to claim 5, wherein: the glue-sand ratio of the high-hardness pouring type gypsum template formula is 1:1, the poly-ash ratio of the high-hardness pouring type gypsum template formula is 6%, and the water-cement ratio of the high-hardness pouring type gypsum template formula is 0.248.
7. The high-hardness cast gypsum template formula according to claim 6, wherein: the experimental cement and the common river sand need to be placed in a dry-curing room (the temperature is 20 +/-1 ℃) for 24 hours in advance.
8. The high hardness cast gypsum template formulation according to claim 7, wherein: the temperature of the dry and empty curing room is kept at 20 +/-1 ℃, and the humidity is kept at about 60%.
9. The high hardness cast gypsum template formulation according to claim 8, wherein: the formula of the high-hardness pouring type gypsum template comprises the following test piece test methods:
s1, putting the weighed liquid (pure acrylic polymer emulsion and liquid defoaming agent) into a stirring pot, uniformly stirring by using a stirring rod, uniformly premixing the weighed powder, putting into the stirring pot, slowly stirring for 2min, and testing the fluidity of the mortar after stopping stirring;
s2, carrying out a fluidity test of the mortar according to JC/T986-;
s3, guiding the uniformly stirred mortar into a mold, vibrating for 1min, leveling the surface, placing the molded test piece mold into a standard curing room for 24h, removing the mold, numbering, curing for 6d under a dry condition, and testing the bending resistance (standard curing for 1d, dry curing for 6 d);
and S4, firstly, measuring the thickness and the width of each group of (6) test pieces by using a vernier caliper, inputting corresponding software programs, and then, sequentially testing the bending resistance to obtain a test force-axial deformation curve of the test pieces, wherein the load corresponding to the highest point of the curve is the maximum force, namely the breaking load (Pm).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585294A (en) * | 2015-11-13 | 2016-05-18 | 北京中企卓创科技发展有限公司 | Hybrid fiber high-crack-resisting and high-tenacity airfield pavement concrete and preparation method thereof |
| CN107673690A (en) * | 2017-09-25 | 2018-02-09 | 沈阳工业大学 | Cement-base composite material with PVA fibers and preparation method thereof |
| CN108455910A (en) * | 2018-04-26 | 2018-08-28 | 合肥金云新材料有限公司 | A kind of high-tenacity fiber enhancing construction material and preparation method thereof |
| CN110183192A (en) * | 2019-07-09 | 2019-08-30 | 吉林重通成飞新材料股份公司 | Cement mortar and preparation method thereof |
-
2021
- 2021-12-15 CN CN202111532943.5A patent/CN114276095A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585294A (en) * | 2015-11-13 | 2016-05-18 | 北京中企卓创科技发展有限公司 | Hybrid fiber high-crack-resisting and high-tenacity airfield pavement concrete and preparation method thereof |
| CN107673690A (en) * | 2017-09-25 | 2018-02-09 | 沈阳工业大学 | Cement-base composite material with PVA fibers and preparation method thereof |
| CN108455910A (en) * | 2018-04-26 | 2018-08-28 | 合肥金云新材料有限公司 | A kind of high-tenacity fiber enhancing construction material and preparation method thereof |
| CN110183192A (en) * | 2019-07-09 | 2019-08-30 | 吉林重通成飞新材料股份公司 | Cement mortar and preparation method thereof |
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