CN113213860A - High-fluidity high-strength mortar material - Google Patents
High-fluidity high-strength mortar material Download PDFInfo
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- CN113213860A CN113213860A CN202110674118.2A CN202110674118A CN113213860A CN 113213860 A CN113213860 A CN 113213860A CN 202110674118 A CN202110674118 A CN 202110674118A CN 113213860 A CN113213860 A CN 113213860A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 84
- 239000000463 material Substances 0.000 title claims abstract description 82
- 239000004568 cement Substances 0.000 claims abstract description 71
- 239000011398 Portland cement Substances 0.000 claims abstract description 52
- 239000006004 Quartz sand Substances 0.000 claims abstract description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 138
- 239000003638 chemical reducing agent Substances 0.000 claims description 125
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 93
- 238000003756 stirring Methods 0.000 claims description 34
- 229960004106 citric acid Drugs 0.000 claims description 31
- 239000002518 antifoaming agent Substances 0.000 claims description 29
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 29
- 239000004327 boric acid Substances 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 29
- 150000001875 compounds Chemical class 0.000 claims description 24
- 150000004706 metal oxides Chemical class 0.000 claims description 24
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 20
- 229910044991 metal oxide Inorganic materials 0.000 claims description 19
- 229920005646 polycarboxylate Polymers 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 17
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 14
- 229910020068 MgAl Inorganic materials 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 14
- YASYEJJMZJALEJ-UHFFFAOYSA-N Citric acid monohydrate Chemical compound O.OC(=O)CC(O)(C(O)=O)CC(O)=O YASYEJJMZJALEJ-UHFFFAOYSA-N 0.000 claims description 12
- 229960002303 citric acid monohydrate Drugs 0.000 claims description 12
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 7
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 7
- 239000001341 hydroxy propyl starch Substances 0.000 claims description 7
- 235000013828 hydroxypropyl starch Nutrition 0.000 claims description 7
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 16
- 230000002349 favourable effect Effects 0.000 description 36
- 230000000694 effects Effects 0.000 description 16
- 238000001179 sorption measurement Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 230000002195 synergetic effect Effects 0.000 description 7
- 230000002411 adverse Effects 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000001603 reducing effect Effects 0.000 description 5
- 230000000979 retarding effect Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a high-fluidity high-strength mortar material, which comprises portland cement, sulphoaluminate cement, quartz sand and an auxiliary agent. The invention has the beneficial effects that: the fluidity of the mortar can reach more than 300mm, and the 3h strength can also reach 30MPa, so that the shortage of the mortar with high fluidity and high strength in the market is made up.
Description
Technical Field
The invention relates to the technical field of cement, in particular to a high-fluidity high-strength mortar material.
Background
The existing high-strength mortar material is divided into two types, 1: the fluidity is good, can reach more than 300mm, but the strength in three hours is lower, and is only 20 MPa. 2: the strength is high at 30MPa or more in three hours, but the fluidity is poor at about 250 mm. The high-strength mortar material is difficult to meet high requirements on fluidity and strength at the same time, and if the fluidity is required to be higher, the strength is inevitably used as a sacrifice, and if the strength is required to be higher, the fluidity of the mortar material is poorer. At present, the mortar material with high fluidity and high strength is not available in the market.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-fluidity high-strength mortar material.
The purpose of the invention is realized by the following technical scheme: a high-fluidity high-strength mortar material comprises portland cement, sulphoaluminate cement, quartz sand and an auxiliary agent;
further, the auxiliary agent comprises a water reducing agent, a defoaming agent, an expanding agent, citric acid and boric acid;
further, according to the weight portion, the cement mortar comprises 10-45 portions of Portland cement, 5-35 portions of sulphoaluminate cement, 50-55 portions of quartz sand, 0.1-0.2 portion of water reducing agent, 0.1-0.2 portion of boric acid, 0.1-0.2 portion of defoaming agent, 0.1-0.2 portion of expanding agent and 0.2-0.3 portion of citric acid;
further, according to the weight portion, the cement mortar comprises 10 portions of Portland cement, 35 portions of sulphoaluminate cement, 55 portions of quartz sand, 0.2 portion of water reducing agent, 0.2 portion of boric acid, 0.1 portion of defoaming agent, 0.1 portion of expanding agent and 0.3 portion of citric acid;
further, according to the weight portion, the cement mortar comprises 45 portions of Portland cement, 5 portions of sulphoaluminate cement, 50 portions of quartz sand, 0.1 portion of water reducing agent, 0.1 portion of boric acid, 0.1 portion of defoaming agent, 0.2 portion of expanding agent and 0.2 portion of citric acid;
further, the water reducing agent is a slow-release concrete water reducing agent formed by wrapping a metal oxide layer on the surface of the water reducing agent;
further, the metal oxide layer is MgAl bimetallic oxide; the water reducing agent is a compound polycarboxylic acid water reducing agent; the mass ratio of the MgAl bimetallic oxide to the compounded polycarboxylic acid water reducing agent is 10-15: 1;
further, the polycarboxylate water reducer comprises 15-25 parts by mass of polycarboxylate water reducer, 3-5 parts by mass of methacrylate, 2-6 parts by mass of sodium dodecyl benzene sulfonate, 2-6 parts by mass of glycerol and 5-10 parts by mass of hydroxypropyl starch ether;
further, the citric acid is citric acid monohydrate.
The further technical proposal is that the high fluidity and high strength mortar material is prepared by the following steps,
1) preparing materials;
2) mixing and stirring;
3) adding water, and stirring for 4-5 min.
The invention has the following advantages: the Portland cement and the sulphoaluminate cement are compounded, the quartz sand is matched, the assistant is utilized to perform a synergistic blending effect on the Portland cement and the sulphoaluminate cement, so that the water cement ratio is reduced as much as possible under the condition of fluidity, the strength is improved, finally, the fluidity of the mortar material can reach more than 300mm, the strength can also reach 30MPa within 3h, and the shortage of the mortar material with high fluidity and high strength on the market is made up.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Example 1: a high-fluidity high-strength mortar material comprises portland cement, sulphoaluminate cement, quartz sand and an auxiliary agent; the Portland cement and the sulphoaluminate cement are compounded, the quartz sand is matched, the assistant is utilized to perform a synergistic blending effect on the Portland cement and the sulphoaluminate cement, so that the water cement ratio is reduced as much as possible under the condition of fluidity, the strength is improved, finally, the fluidity of the mortar material can reach more than 300mm, the strength can also reach 30MPa within 3h, and the shortage of the mortar material with high fluidity and high strength on the market is made up.
The auxiliary agent comprises a water reducing agent, a defoaming agent, an expanding agent, citric acid and boric acid; in the embodiment, the boric acid in the auxiliary agent is favorable for retarding coagulation and increasing the later strength; the defoaming agent is favorable for eliminating bubbles generated in the stirring process, so that the surface is smooth and attractive; the water reducing agent is beneficial to increasing the fluidity and the strength; the expanding agent is favorable for increasing the micro-expansion performance of the grouting material, so that the slurry is fully connected with the original base layer without gaps.
According to weight percentage, comprises 10 to 45 portions of Portland cement, 5 to 35 portions of sulphoaluminate cement, 50 to 55 portions of quartz sand, 0.1 to 0.2 portion of water reducing agent, 0.1 to 0.2 portion of boric acid, 0.1 to 0.2 portion of defoaming agent, 0.1 to 0.2 portion of expanding agent and 0.2 to 0.3 portion of citric acid. The proper weight portion proportion is favorable for the silicate cement, the sulphoaluminate cement, the quartz sand and various assistants to play a synergistic effect, the fluidity and the strength of the mortar material are simultaneously improved, and the 3h strength reaches 30MPa when the fluidity reaches more than 300 mm.
The water reducing agent is a slow-release concrete water reducing agent formed by wrapping a metal oxide layer on the surface of the water reducing agent; in this embodiment, wrap up metal oxide in the surface of water-reducing agent, be favorable to making metal oxide form the adsorption carrier for the water-reducing agent adsorbs on the internal surface of carrier, is favorable to forming the slowly-releasing, has delayed the time of dissolving out of water-reducing agent, is favorable to making the mobility of concrete keep longer time, and can not bring adverse effect to the intensity of concrete middle and later stage.
The metal oxide layer is MgAl bimetallic oxide; the water reducing agent is a compound polycarboxylic acid water reducing agent; the mass ratio of the MgAl bimetallic oxide to the compounded polycarboxylic acid water reducing agent is 10-15: 1; in the embodiment, the bimetal oxide can be prepared by a conventional method, the water reducing agent is a compound polycarboxylate water reducing agent, the effect of the water reducing agent is favorably improved, and the proper mass ratio is favorable for adsorption to form a stable wrapped sphere.
The compound polycarboxylate water reducer comprises, by mass, 15-25 parts of polycarboxylate water reducer, 3-5 parts of methacrylate, 2-6 parts of sodium dodecyl benzene sulfonate, 2-6 parts of glycerol and 5-10 parts of hydroxypropyl starch ether; the adoption of the compound type polyacid water reducing agent is beneficial to forming a stable comb-line molecular structure, releasing excessive water among cement particles when slow release occurs, and improving the water reducing effect of the water reducing agent.
The citric acid is citric acid monohydrate; in the embodiment, citric acid monohydrate is beneficial to prolonging the construction time and increasing the fluidity.
The high-fluidity high-strength mortar material is prepared by the following steps,
1) preparing materials: determining the mixture ratio according to the model of the required grouting material;
2) mixing and stirring: pouring the mixture into a stirrer to stir the raw materials uniformly for use;
3) adding water and stirring for 4-5 min: adding water according to the water-cement ratio and uniformly stirring.
And the proper preparation and stirring steps are adopted, so that the mixing uniformity and the production and processing efficiency of the mortar are improved.
Example 2: a high-fluidity high-strength mortar material comprises portland cement, sulphoaluminate cement, quartz sand and an auxiliary agent; the Portland cement and the sulphoaluminate cement are compounded, the quartz sand is matched, the assistant is utilized to perform a synergistic blending effect on the Portland cement and the sulphoaluminate cement, so that the water cement ratio is reduced as much as possible under the condition of fluidity, the strength is improved, finally, the fluidity of the mortar material can reach more than 300mm, the strength can also reach 30MPa within 3h, and the shortage of the mortar material with high fluidity and high strength on the market is made up.
The auxiliary agent comprises a water reducing agent, a defoaming agent, an expanding agent, citric acid and boric acid; in the embodiment, the boric acid in the auxiliary agent is favorable for retarding coagulation and increasing the later strength; the defoaming agent is favorable for eliminating bubbles generated in the stirring process, so that the surface is smooth and attractive; the water reducing agent is beneficial to increasing the fluidity and the strength; the expanding agent is favorable for increasing the micro-expansion performance of the grouting material, so that the slurry is fully connected with the original base layer without gaps.
According to the weight fraction, 10 parts of portland cement, 35 parts of sulphoaluminate cement, 55 parts of quartz sand, 0.2 part of water reducing agent, 0.2 part of boric acid, 0.1 part of defoaming agent, 0.1 part of expanding agent and 0.3 part of citric acid;
the water reducing agent is a slow-release concrete water reducing agent formed by wrapping a metal oxide layer on the surface of the water reducing agent; in this embodiment, wrap up metal oxide in the surface of water-reducing agent, be favorable to making metal oxide form the adsorption carrier for the water-reducing agent adsorbs on the internal surface of carrier, is favorable to forming the slowly-releasing, has delayed the time of dissolving out of water-reducing agent, is favorable to making the mobility of concrete keep longer time, and can not bring adverse effect to the intensity of concrete middle and later stage.
The metal oxide layer is MgAl bimetallic oxide; the water reducing agent is a compound polycarboxylic acid water reducing agent; the mass ratio of the MgAl bimetallic oxide to the compounded polycarboxylic acid water reducing agent is 10-15: 1; in the embodiment, the bimetal oxide can be prepared by a conventional method, the water reducing agent is a compound polycarboxylate water reducing agent, the effect of the water reducing agent is favorably improved, and the proper mass ratio is favorable for adsorption to form a stable wrapped sphere.
The compound polycarboxylate water reducer comprises, by mass, 15-25 parts of polycarboxylate water reducer, 3-5 parts of methacrylate, 2-6 parts of sodium dodecyl benzene sulfonate, 2-6 parts of glycerol and 5-10 parts of hydroxypropyl starch ether; the adoption of the compound type polyacid water reducing agent is beneficial to forming a stable comb-line molecular structure, releasing excessive water among cement particles when slow release occurs, and improving the water reducing effect of the water reducing agent.
The citric acid is citric acid monohydrate; in the embodiment, citric acid monohydrate is beneficial to prolonging the construction time and increasing the fluidity.
The high-fluidity high-strength mortar material is prepared by the following steps,
1) preparing materials: determining the mixture ratio according to the model of the required grouting material;
2) mixing and stirring: pouring into a stirrer to uniformly stir the raw materials for use
3) Adding water and stirring for 4-5 min: adding water according to the water-cement ratio and uniformly stirring.
And the proper preparation and stirring steps are adopted, so that the mixing uniformity and the production and processing efficiency of the mortar are improved.
Example 3: a high-fluidity high-strength mortar material comprises portland cement, sulphoaluminate cement, quartz sand and an auxiliary agent; the Portland cement and the sulphoaluminate cement are compounded, the quartz sand is matched, the assistant is utilized to perform a synergistic blending effect on the Portland cement and the sulphoaluminate cement, so that the water cement ratio is reduced as much as possible under the condition of fluidity, the strength is improved, finally, the fluidity of the mortar material can reach more than 300mm, the strength can also reach 30MPa within 3h, and the shortage of the mortar material with high fluidity and high strength on the market is made up.
The auxiliary agent comprises a water reducing agent, a defoaming agent, an expanding agent, citric acid and boric acid; in the embodiment, the boric acid in the auxiliary agent is favorable for retarding coagulation and increasing the later strength; the defoaming agent is favorable for eliminating bubbles generated in the stirring process, so that the surface is smooth and attractive; the water reducing agent is beneficial to increasing the fluidity and the strength; the expanding agent is favorable for increasing the micro-expansion performance of the grouting material, so that the slurry is fully connected with the original base layer without gaps.
According to weight percentage, the cement comprises 45 parts of Portland cement, 5 parts of sulphoaluminate cement, 50 parts of quartz sand, 0.1 part of water reducing agent, 0.1 part of boric acid, 0.1 part of defoaming agent, 0.2 part of expanding agent and 0.2 part of citric acid;
the water reducing agent is a slow-release concrete water reducing agent formed by wrapping a metal oxide layer on the surface of the water reducing agent; in this embodiment, wrap up metal oxide in the surface of water-reducing agent, be favorable to making metal oxide form the adsorption carrier for the water-reducing agent adsorbs on the internal surface of carrier, is favorable to forming the slowly-releasing, has delayed the time of dissolving out of water-reducing agent, is favorable to making the mobility of concrete keep longer time, and can not bring adverse effect to the intensity of concrete middle and later stage.
The metal oxide layer is MgAl bimetallic oxide; the water reducing agent is a compound polycarboxylic acid water reducing agent; the mass ratio of the MgAl bimetallic oxide to the compounded polycarboxylic acid water reducing agent is 10-15: 1; in the embodiment, the bimetal oxide can be prepared by a conventional method, the water reducing agent is a compound polycarboxylate water reducing agent, the effect of the water reducing agent is favorably improved, and the proper mass ratio is favorable for adsorption to form a stable wrapped sphere.
The compound polycarboxylate water reducer comprises, by mass, 15-25 parts of polycarboxylate water reducer, 3-5 parts of methacrylate, 2-6 parts of sodium dodecyl benzene sulfonate, 2-6 parts of glycerol and 5-10 parts of hydroxypropyl starch ether; the adoption of the compound type polyacid water reducing agent is beneficial to forming a stable comb-line molecular structure, releasing excessive water among cement particles when slow release occurs, and improving the water reducing effect of the water reducing agent.
The citric acid is citric acid monohydrate; in the embodiment, citric acid monohydrate is beneficial to prolonging the construction time and increasing the fluidity.
The high-fluidity high-strength mortar material is prepared by the following steps,
1) preparing materials: determining the mixture ratio according to the model of the required grouting material;
2) mixing and stirring: pouring into a stirrer to uniformly stir the raw materials for use
3) Adding water and stirring for 4-5 min: adding water according to the water-cement ratio and uniformly stirring.
And the proper preparation and stirring steps are adopted, so that the mixing uniformity and the production and processing efficiency of the mortar are improved.
Example 4: a high-fluidity high-strength mortar material comprises portland cement, sulphoaluminate cement, quartz sand and an auxiliary agent; the Portland cement and the sulphoaluminate cement are compounded, the quartz sand is matched, the assistant is utilized to perform a synergistic blending effect on the Portland cement and the sulphoaluminate cement, so that the water cement ratio is reduced as much as possible under the condition of fluidity, the strength is improved, finally, the fluidity of the mortar material can reach more than 300mm, the strength can also reach 30MPa within 3h, and the shortage of the mortar material with high fluidity and high strength on the market is made up.
The auxiliary agent comprises a water reducing agent, a defoaming agent, an expanding agent, citric acid and boric acid; in the embodiment, the boric acid in the auxiliary agent is favorable for retarding coagulation and increasing the later strength; the defoaming agent is favorable for eliminating bubbles generated in the stirring process, so that the surface is smooth and attractive; the water reducing agent is beneficial to increasing the fluidity and the strength; the expanding agent is favorable for increasing the micro-expansion performance of the grouting material, so that the slurry is fully connected with the original base layer without gaps.
According to weight fraction, 20 parts of portland cement, 25 parts of sulphoaluminate cement, 55 parts of quartz sand, 0.2 part of water reducing agent, 0.2 part of boric acid, 0.1 part of defoaming agent, 0.1 part of expanding agent and 0.3 part of citric acid comprise 45 parts of portland cement, 5 parts of sulphoaluminate cement, 50 parts of quartz sand, 0.1 part of water reducing agent, 0.1 part of boric acid, 0.1 part of defoaming agent, 0.2 part of expanding agent and 0.2 part of citric acid;
the water reducing agent is a slow-release concrete water reducing agent formed by wrapping a metal oxide layer on the surface of the water reducing agent; in this embodiment, wrap up metal oxide in the surface of water-reducing agent, be favorable to making metal oxide form the adsorption carrier for the water-reducing agent adsorbs on the internal surface of carrier, is favorable to forming the slowly-releasing, has delayed the time of dissolving out of water-reducing agent, is favorable to making the mobility of concrete keep longer time, and can not bring adverse effect to the intensity of concrete middle and later stage.
The metal oxide layer is MgAl bimetallic oxide; the water reducing agent is a compound polycarboxylic acid water reducing agent; the mass ratio of the MgAl bimetallic oxide to the compounded polycarboxylic acid water reducing agent is 10-15: 1; in the embodiment, the bimetal oxide can be prepared by a conventional method, the water reducing agent is a compound polycarboxylate water reducing agent, the effect of the water reducing agent is favorably improved, and the proper mass ratio is favorable for adsorption to form a stable wrapped sphere.
The compound polycarboxylate water reducer comprises, by mass, 15-25 parts of polycarboxylate water reducer, 3-5 parts of methacrylate, 2-6 parts of sodium dodecyl benzene sulfonate, 2-6 parts of glycerol and 5-10 parts of hydroxypropyl starch ether; the adoption of the compound type polyacid water reducing agent is beneficial to forming a stable comb-line molecular structure, releasing excessive water among cement particles when slow release occurs, and improving the water reducing effect of the water reducing agent.
The citric acid is citric acid monohydrate; in the embodiment, citric acid monohydrate is beneficial to prolonging the construction time and increasing the fluidity.
The high-fluidity high-strength mortar material is prepared by the following steps,
1) preparing materials: determining the mixture ratio according to the model of the required grouting material;
2) mixing and stirring: pouring into a stirrer to uniformly stir the raw materials for use
3) Adding water and stirring for 4-5 min: adding water according to the water-cement ratio and uniformly stirring.
And the proper preparation and stirring steps are adopted, so that the mixing uniformity and the production and processing efficiency of the mortar are improved.
Example 5: a high-fluidity high-strength mortar material comprises portland cement, sulphoaluminate cement, quartz sand and an auxiliary agent; the Portland cement and the sulphoaluminate cement are compounded, the quartz sand is matched, the assistant is utilized to perform a synergistic blending effect on the Portland cement and the sulphoaluminate cement, so that the water cement ratio is reduced as much as possible under the condition of fluidity, the strength is improved, finally, the fluidity of the mortar material can reach more than 300mm, the strength can also reach 30MPa within 3h, and the shortage of the mortar material with high fluidity and high strength on the market is made up.
The auxiliary agent comprises a water reducing agent, a defoaming agent, an expanding agent, citric acid and boric acid; in the embodiment, the boric acid in the auxiliary agent is favorable for retarding coagulation and increasing the later strength; the defoaming agent is favorable for eliminating bubbles generated in the stirring process, so that the surface is smooth and attractive; the water reducing agent is beneficial to increasing the fluidity and the strength; the expanding agent is favorable for increasing the micro-expansion performance of the grouting material, so that the slurry is fully connected with the original base layer without gaps.
According to weight fraction, 35 parts of portland cement, 15 parts of sulphoaluminate cement, 50 parts of quartz sand, 0.1 part of water reducing agent, 0.1 part of boric acid, 0.1 part of defoaming agent, 0.2 part of expanding agent and 0.2 part of citric acid comprise 45 parts of portland cement, 5 parts of sulphoaluminate cement, 50 parts of quartz sand, 0.1 part of water reducing agent, 0.1 part of boric acid, 0.1 part of defoaming agent, 0.2 part of expanding agent and 0.2 part of citric acid;
the water reducing agent is a slow-release concrete water reducing agent formed by wrapping a metal oxide layer on the surface of the water reducing agent; in this embodiment, wrap up metal oxide in the surface of water-reducing agent, be favorable to making metal oxide form the adsorption carrier for the water-reducing agent adsorbs on the internal surface of carrier, is favorable to forming the slowly-releasing, has delayed the time of dissolving out of water-reducing agent, is favorable to making the mobility of concrete keep longer time, and can not bring adverse effect to the intensity of concrete middle and later stage.
The metal oxide layer is MgAl bimetallic oxide; the water reducing agent is a compound polycarboxylic acid water reducing agent; the mass ratio of the MgAl bimetallic oxide to the compounded polycarboxylic acid water reducing agent is 10-15: 1; in the embodiment, the bimetal oxide can be prepared by a conventional method, the water reducing agent is a compound polycarboxylate water reducing agent, the effect of the water reducing agent is favorably improved, and the proper mass ratio is favorable for adsorption to form a stable wrapped sphere.
The compound polycarboxylate water reducer comprises, by mass, 15-25 parts of polycarboxylate water reducer, 3-5 parts of methacrylate, 2-6 parts of sodium dodecyl benzene sulfonate, 2-6 parts of glycerol and 5-10 parts of hydroxypropyl starch ether; the adoption of the compound type polyacid water reducing agent is beneficial to forming a stable comb-line molecular structure, releasing excessive water among cement particles when slow release occurs, and improving the water reducing effect of the water reducing agent.
The citric acid is citric acid monohydrate; in the embodiment, citric acid monohydrate is beneficial to prolonging the construction time and increasing the fluidity.
The high-fluidity high-strength mortar material is prepared by the following steps,
1) preparing materials: determining the mixture ratio according to the model of the required grouting material;
2) mixing and stirring: pouring into a stirrer to uniformly stir the raw materials for use
3) Adding water and stirring for 4-5 min: adding water according to the water-cement ratio and uniformly stirring.
And the proper preparation and stirring steps are adopted, so that the mixing uniformity and the production and processing efficiency of the mortar are improved.
The fluidity and 3h strength results of the resulting mortar compositions prepared in examples 2 to 5 are shown in Table 1 below.
TABLE 1 fluidity and 3h Strength results for the mortars prepared in examples 2-5
From the results in Table 1, it is understood that when the Portland cement content is low and the sulphoaluminate cement content is high, the 3-hour strength of the mortar material reaches the maximum of 39MPa, and the fluidity is lower than that of other examples, but can reach more than 300 m; meanwhile, it can be known that when the content of the portland cement is high and the content of the sulphoaluminate cement is low, the fluidity of the mortar material is optimal and reaches 330mm, and although the strength is low compared with other embodiments, the fluidity can also reach 30mmMPa, so that the portland cement and the sulphoaluminate cement are matched with each other in the mortar material, and under the condition of matching quartz sand and other auxiliaries, the fluidity of the mortar material can reach more than 300mm, and the strength of 3h can also reach 30MPa, so that the mortar material has high fluidity and high strength.
Example 6: comparative experiment 1: the influence of the single use of the portland cement or the sulphoaluminate cement for preparing the mortar material and the compound use of the portland cement and the sulphoaluminate cement for preparing the mortar material on the strength for 3 hours.
Control group 1: the mortar material is prepared by the same method as in example 2, except that no sulphoaluminate cement is contained in the mixture ratio, and specifically, the mortar material comprises 10 parts of portland cement, 0 part of sulphoaluminate cement, 55 parts of quartz sand, 0.2 part of a water reducing agent, 0.2 part of boric acid, 0.1 part of an antifoaming agent, 0.1 part of an expanding agent and 0.3 part of citric acid in parts by weight.
Control group 2: the mortar material was prepared in the same manner as in example 2, except that the mortar material contained no portland cement in the formulation, specifically, the mortar material contained, in terms of weight fraction, 0 part of portland cement, 35 parts of sulphoaluminate cement, 55 parts of quartz sand, 0.2 part of a water reducing agent, 0.2 part of boric acid, 0.1 part of a defoaming agent, 0.1 part of an expanding agent, and 0.3 part of citric acid.
Experimental groups: a mortar material was prepared by the method of example 2.
The 3h strength results of the mortar materials prepared in the control group 1, the control group 2 and the experimental group are shown in the following table 2.
TABLE 2 mortar strength results for 3h prepared from control 1, control 2 and experimental groups
From the results shown in Table 2, it is understood that the strength of the mortar material obtained by using portland cement or sulphoaluminate cement alone for 3 hours is not more excellent than the strength of the mortar material obtained by mixing portland cement and sulphoaluminate cement, and particularly, the strength of the mortar material obtained by using the control group containing no sulphoaluminate cement is extremely low for 3 hours, whereas the strength of the mortar material obtained by using sulphoaluminate cement alone for 3 hours is not more than 30 MPa.
Example 7: comparative experiment 2: the influence on the fluidity of the mortar prepared by singly using the portland cement or the sulphoaluminate cement and the mortar prepared by compositely using the portland cement and the sulphoaluminate cement.
Control group 1: the mortar material was prepared in the same manner as in example 3, except that the mixture was prepared without containing sulphoaluminate in terms of weight fraction, and included 45 parts of portland cement, 0 part of sulphoaluminate cement, 50 parts of quartz sand, 0.1 part of water reducing agent, 0.1 part of boric acid, 0.1 part of defoaming agent, 0.2 part of swelling agent, and 0.2 part of citric acid.
Control group 2: the mortar material was prepared in the same manner as in example 3, except that the mixture ratio was not containing portland cement, and specifically, the mortar material included, in terms of weight fraction, 0 part of portland cement, 5 parts of sulphoaluminate cement, 50 parts of quartz sand, 0.1 part of a water reducing agent, 0.1 part of boric acid, 0.1 part of a defoaming agent, 0.2 part of an expanding agent, and 0.2 part of citric acid.
Experimental groups: a mortar composition was prepared by the method of example 3.
The fluidity results of the mortar materials prepared in the control group 1, the control group 2 and the experimental group are shown in the following table 3.
TABLE 3 mortar fluidity results obtained by control 1, control 2 and experimental groups
| Fluidity (mm) | |
| Control group 1 | 273 |
| Control group 2 | 169 |
| Experimental group | 330 |
From the results in Table 3, it is understood that the fluidity of the mortar material prepared by using portland cement or sulphoaluminate cement alone is not superior to that of the mortar material prepared by mixing portland cement and sulphoaluminate cement, and particularly in the control group containing no portland cement, the fluidity is very low, and the fluidity of the mortar material prepared by using portland cement alone is not as high as 300mm or more.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a high fluidity high strength mortar material which characterized in that: comprises portland cement, sulphoaluminate cement, quartz sand and an auxiliary agent.
2. A high fluidity high strength mortar composition according to claim 1, wherein: the auxiliary agent comprises a water reducing agent, a defoaming agent, an expanding agent, citric acid and boric acid.
3. A high fluidity high strength mortar composition according to claim 2, wherein: according to weight percentage, comprises 10 to 45 portions of Portland cement, 5 to 35 portions of sulphoaluminate cement, 50 to 55 portions of quartz sand, 0.1 to 0.2 portion of water reducing agent, 0.1 to 0.2 portion of boric acid, 0.1 to 0.2 portion of defoaming agent, 0.1 to 0.2 portion of expanding agent and 0.2 to 0.3 portion of citric acid.
4. A high fluidity high strength mortar material according to claim 3, wherein: the cement comprises, by weight, 10 parts of portland cement, 35 parts of sulphoaluminate cement, 55 parts of quartz sand, 0.2 part of a water reducing agent, 0.2 part of boric acid, 0.1 part of a defoaming agent, 0.1 part of an expanding agent and 0.3 part of citric acid, and is characterized in that: .
5. A high fluidity high strength mortar material according to claim 3, wherein: according to weight percentage, comprises 45 portions of Portland cement, 5 portions of sulphoaluminate cement, 50 portions of quartz sand, 0.1 portion of water reducing agent, 0.1 portion of boric acid, 0.1 portion of defoaming agent, 0.2 portion of expanding agent and 0.2 portion of citric acid.
6. A high fluidity high strength mortar composition according to claim 2, wherein: the water reducing agent is a slow-release concrete water reducing agent formed by wrapping a metal oxide layer on the surface of the water reducing agent.
7. The high fluidity high strength mortar material according to claim 6, wherein: the metal oxide layer is MgAl bimetallic oxide; the water reducing agent is a compound polycarboxylic acid water reducing agent; the mass ratio of the MgAl bimetallic oxide to the compounded polycarboxylic acid water reducing agent is 10-15: 1.
8. The high fluidity high strength mortar material according to claim 7, wherein: the compound polycarboxylate water reducer comprises, by mass, 15-25 parts of polycarboxylate water reducer, 3-5 parts of methacrylate, 2-6 parts of sodium dodecyl benzene sulfonate, 2-6 parts of glycerol and 5-10 parts of hydroxypropyl starch ether.
9. A high fluidity high strength mortar composition according to claim 2, wherein: the citric acid is citric acid monohydrate.
10. A high fluidity high strength mortar composition according to claim 1, wherein: the high-fluidity high-strength mortar material is prepared by the following steps,
1) preparing materials;
2) mixing and stirring;
3) adding water, and stirring for 4-5 min.
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