CN117342807A - Low-heat cement and production process thereof - Google Patents
Low-heat cement and production process thereof Download PDFInfo
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- CN117342807A CN117342807A CN202311648617.XA CN202311648617A CN117342807A CN 117342807 A CN117342807 A CN 117342807A CN 202311648617 A CN202311648617 A CN 202311648617A CN 117342807 A CN117342807 A CN 117342807A
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- cement
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- low
- heat
- hollow glass
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- 239000004568 cement Substances 0.000 title claims abstract description 132
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 41
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 40
- 239000004917 carbon fiber Substances 0.000 claims abstract description 40
- 239000011324 bead Substances 0.000 claims abstract description 37
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 34
- 238000000227 grinding Methods 0.000 claims abstract description 33
- 239000010440 gypsum Substances 0.000 claims abstract description 28
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 28
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 235000019738 Limestone Nutrition 0.000 claims abstract description 21
- 239000006028 limestone Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 17
- 239000003469 silicate cement Substances 0.000 claims abstract description 14
- 239000011787 zinc oxide Substances 0.000 claims abstract description 13
- -1 grinding aid Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004005 microsphere Substances 0.000 claims abstract description 9
- 239000010451 perlite Substances 0.000 claims abstract description 9
- 235000019362 perlite Nutrition 0.000 claims abstract description 9
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 claims abstract description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000839 emulsion Substances 0.000 claims abstract description 8
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 7
- 239000003365 glass fiber Substances 0.000 claims abstract description 6
- 229920001225 polyester resin Polymers 0.000 claims abstract description 6
- 239000004645 polyester resin Substances 0.000 claims abstract description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims abstract description 4
- FBPFZTCFMRRESA-GUCUJZIJSA-N galactitol Chemical compound OC[C@H](O)[C@@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-GUCUJZIJSA-N 0.000 claims abstract description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 19
- 229910052582 BN Inorganic materials 0.000 claims description 15
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 13
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 claims description 13
- 239000011294 coal tar pitch Substances 0.000 claims description 12
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 claims description 8
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 8
- 235000013379 molasses Nutrition 0.000 claims description 8
- 229930182830 galactose Natural products 0.000 claims description 7
- 229910021487 silica fume Inorganic materials 0.000 claims description 7
- CHZLVSBMXZSPNN-UHFFFAOYSA-N 2,4-dimethylbenzenesulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C(C)=C1 CHZLVSBMXZSPNN-UHFFFAOYSA-N 0.000 claims description 6
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 claims description 6
- 235000021360 Myristic acid Nutrition 0.000 claims description 5
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 244000248349 Citrus limon Species 0.000 claims description 3
- 235000005979 Citrus limon Nutrition 0.000 claims description 3
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 229940105132 myristate Drugs 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000000643 oven drying Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000006703 hydration reaction Methods 0.000 abstract description 60
- 230000036571 hydration Effects 0.000 abstract description 59
- SHFGJEQAOUMGJM-UHFFFAOYSA-N dialuminum dipotassium disodium dioxosilane iron(3+) oxocalcium oxomagnesium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Na+].[Na+].[Al+3].[Al+3].[K+].[K+].[Fe+3].[Fe+3].O=[Mg].O=[Ca].O=[Si]=O SHFGJEQAOUMGJM-UHFFFAOYSA-N 0.000 abstract 1
- 239000012467 final product Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 18
- 239000004567 concrete Substances 0.000 description 15
- 239000013078 crystal Substances 0.000 description 7
- 239000011398 Portland cement Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000013329 compounding Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 239000011863 silicon-based powder Substances 0.000 description 5
- 229910052918 calcium silicate Inorganic materials 0.000 description 4
- 235000012241 calcium silicate Nutrition 0.000 description 4
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- AGWMJKGGLUJAPB-UHFFFAOYSA-N aluminum;dicalcium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Ca+2].[Ca+2].[Fe+3] AGWMJKGGLUJAPB-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- JETSKDPKURDVNI-UHFFFAOYSA-N [C].[Ca] Chemical compound [C].[Ca] JETSKDPKURDVNI-UHFFFAOYSA-N 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010668 complexation reaction Methods 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 2
- 229910001653 ettringite Inorganic materials 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 210000002268 wool Anatomy 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the technical field of cement preparation, and particularly discloses low-temperature cement and a production process thereof. The low-heat cement is mainly prepared from the following raw materials: silicate cement clinker, gypsum, fly ash, grinding aid, auxiliary agent and reinforcing agent, wherein the reinforcing agent comprises limestone, modified hollow glass beads and carbon fiber; the preparation method of the modified hollow glass microsphere comprises the following steps: mixing basalt fibers, hollow glass beads and polyester resin to obtain an intermediate material I; mixing galactitol, myristic acid, polyethylene glycol, aluminum oxide and perlite to obtain a second intermediate; mixing the intermediate material I, the acrylic emulsion, the intermediate material II, the glass fiber and the tetrapod-like zinc oxide whisker, and drying to obtain the composite material; the preparation method comprises the following steps: mixing the raw materials to obtain a mixture; grinding the mixture together to obtain the final product. The cement prepared by the method has low hydration heat and better compressive strength.
Description
Technical Field
The application relates to the technical field of cement preparation, in particular to low-temperature cement and a production process thereof.
Background
With the rise of foundation construction in China, concrete has become an indispensable material in large-scale engineering construction of bridges, tunnels, railways, water conservancy and the like due to the advantages of low cost, high strength, good durability and the like, and meanwhile, in the fields of national defense engineering and precision engineering, the magnetism of the concrete needs to be reduced in order to reduce magnetic interference. Cement is used as a main cementing material in concrete, the performance of the cement is related to the mechanical property, durability and other aspects of the concrete, and meanwhile, the magnetism of the concrete is influenced. The strength of the concrete is continuously increased along with the progress of cement hydration, and the heat released by cement hydration is accumulated in the concrete and is not easy to be lost, so that the temperature in the concrete is increased. The rise of the internal temperature of the concrete leads to the formation of huge temperature difference and temperature stress between the inside and the outside of the concrete, which is easy to cause the generation of concrete cracks, forms the structural damage of the concrete and brings harm to engineering. Therefore, in order to ensure the quality of concrete engineering, the hydration heat of the cement used is controlled in addition to proper heat reduction measures adopted during construction.
In order to reduce the influence of heat on the quality of concrete engineering, the low-heat silicate cement taking dicalcium silicate as a dominant mineral, namely low-heat cement, is researched and developed, has the characteristics of low hydration heat, large later strength increase rate and the like, is applied to concrete, has lower hydration temperature rise, has longer time to reach peak temperature, and is convenient for reducing the influence of heat on cement products.
The dicalcium silicate in the low-heat silicate cement has high content, so that the low-heat silicate cement has the performance advantages of low hydration heat, high later strength and the like, but the early strength of the cement is low due to the slow hydration speed of the dicalcium silicate in the early stage, so that the use of the low-heat silicate cement is influenced.
Thus, there is a need to prepare a low-heat cement with high early strength and low hydration heat.
Disclosure of Invention
In order to further improve the early strength of the low-heat cement, the application provides the low-heat cement and a production process thereof.
In a first aspect, the present application provides a low-heat cement, which adopts the following technical scheme:
the low-heat cement is mainly prepared from the following raw materials in parts by weight: 70-80 parts of silicate cement clinker, 8-9 parts of gypsum, 5-10 parts of fly ash, 1-2 parts of grinding aid, 3-5 parts of auxiliary agent and 5-8 parts of reinforcing agent, wherein the auxiliary agent comprises trimethylolethane, coal tar pitch and silica fume, and the reinforcing agent comprises limestone, modified hollow glass beads and carbon fiber; the preparation method of the modified hollow glass microsphere comprises the following steps: s1, preparing an intermediate: grinding and uniformly mixing basalt fibers and hollow glass beads, adding molten polyester resin, cooling and grinding to obtain an intermediate material I; s2, preparing a second intermediate material: mixing myristic acid, dimethylformamide and thionyl chloride, reacting to obtain pretreated myristic acid, mixing galactitol with pretreated myristic acid, and reacting to obtain myristic acid galactose ester; mixing galactose myristate, polyethylene glycol and aluminum oxide to obtain a mixture, mixing the mixture with perlite to obtain mixed perlite, standing under vacuum condition, and drying to obtain an intermediate material II; s3, producing modified hollow glass beads: and (3) immersing the intermediate material I prepared in the step (S1) in acrylic emulsion to obtain a pretreated intermediate material I, mixing the pretreated intermediate material I with the intermediate material II prepared in the step (S2), glass fibers, tetrapod-like zinc oxide whiskers, boron nitride, phenyl silicone oil and aluminum oxide, and drying to obtain the modified acrylic emulsion.
Preferably, the boron nitride is hexagonal boron nitride.
By adopting the technical scheme, three components of the grinding aid, the auxiliary agent and the reinforcing agent are added in the cement preparation process, and the three components of the grinding aid, the auxiliary agent and the reinforcing agent interact with cement clinker and gypsum, so that on one hand, the hydration heat of cement in the use process is conveniently reduced, on the other hand, the hydration heat generated in the cement hydration process is conveniently led out, and the heat aggregation in the cement hydration process is reduced, so that the influence of the heat on the strength of cement products prepared by the cement is reduced; wherein,
the auxiliary agent comprises trimethylolethane, coal tar pitch and silica fume, and the trimethylolethane, the coal tar pitch and the silica fume are mutually matched so as to be convenient for synergistic effect with the reinforcing agent, thereby reducing the hydration heat of cement, reducing the influence of the hydration heat on the cement performance and improving the compressive strength of the cement;
the reinforcing agent comprises limestone, modified hollow glass beads and carbon fibers, limestone particles become crystal nuclei, a large amount of hydration products are deposited on the surfaces of the crystal nuclei to form dense carpet-like piled matters and clear wool Cong Ou, so that the connection strength of all components of the cement is improved, the prepared cement has low expansion rate, a compact microstructure and obviously reduced microcracks; carbon fibers are easy to contact with each other and are matched with the reinforcing agent to form a heat conduction path, so that the carbon fibers are convenient to be matched with the tetrapod-shaped zinc oxide whiskers and the boron nitride on the surfaces of the modified hollow glass microspheres, and the influence of heat on the cement performance is reduced; the modified hollow glass beads take the hollow glass beads as a core layer, the shell layers are filled with mixed raw materials, the heat conduction particle distribution and three-dimensional structure with different stacking degrees are formed on the surfaces of the hollow glass beads, the maximum particle stacking degree is formed, the synergistic heat conduction channel effect among the components is fully exerted, and the heat conduction performance of the matrix is improved.
Preferably, the reinforcing agent consists of limestone, modified hollow glass beads and carbon fibers in a mass ratio of (5-10): (8-15): (2-3).
By adopting the technical scheme, the reinforcing agent is prepared by compounding three components of limestone, modified hollow glass beads and carbon fibers, and the proportion of the three components is adjusted so as to ensure that the proportion of the three components is optimal; limestone and gypsum are matched with each other to participate in the hydration of cement so as to generate hydration products mainly comprising monocarbon calcium aluminate, and a hydrated calcium carbonate film is coated on clinker particles, so that the hydration and coagulation of cement clinker are slowed down, the formation of a coagulation structure is delayed, the formation of a compact structure of cement paste is facilitated, the conversion of ettringite into monosulfur hydrated calcium sulfoaluminate is reduced, the generation of ettringite is stabilized, the monocarbon calcium aluminate is hexagonal flaky crystals, the sizes of the crystals are rapidly increased at the initial stage of hydration, and the crystals are converted into firm and continuous crystal aggregates; carbon fibers are easy to contact with each other and are matched with the reinforcing agent to form a heat conduction path, so that the carbon fibers are convenient to be matched with the tetrapod-shaped zinc oxide whiskers and the boron nitride on the surfaces of the modified hollow glass microspheres, and the influence of heat on the cement performance is reduced; the modified hollow glass bead adopts self-made mode, the shell layer contains four needle-shaped zinc oxide whisker, boron nitride, aluminum oxide heat conduction material and contains myristic acid galactose ester, perlite's cladding material, the sandwich layer is hollow glass bead, basalt fiber mixed material, the modified hollow glass bead prepared from this is good in heat resistance, and the heat conductivity is stronger, the heat that will produce is stored through the form of phase transition simultaneously, release when the temperature is less than a certain threshold value, make the temperature be in reasonable scope, reduce the influence of heat to the cement performance, phenyl silicone oil helps the heat conduction mixed material on the surface of wet modified hollow glass bead, thereby better establishment heat conduction channel, effectively reduce the viscosity of combined material, increase the thermal conductivity of material.
Preferably, the auxiliary agent consists of trimethylolethane, coal tar pitch and micro silicon powder according to the mass ratio of (3-5) (2-3) (7-8).
By adopting the technical scheme, the auxiliary agent is prepared by compounding three components of trimethylolethane, coal tar pitch and silica fume, and the proportion of the three components is adjusted so as to ensure that the proportion of the three components is optimal; the micro silicon powder is a low hydration heat material, has good heat resistance, does not participate in hydration reaction, and is connected with hydration products, so that the whole structure is compact and compact, the pores and cracks are fewer, the permeability is low, and the high-strength performance is realized; the coal tar pitch has the effects of absorbing heat and storing energy, is convenient for better controlling the problem of cement slurry in the hydration process, is beneficial to realizing low heat release of cement slurry and meets the production requirement of compressive strength; before the phase change of the trimethylolethane, the hydroxyl groups form intermolecular association hydrogen bonds, and after the phase change, trimethylolethane molecules move along a molecular layer and cause the hydrogen bonds to break, so that the trimethylolethane is matched with coal tar pitch and silica fume, and the influence of heat on the cement hydration process is reduced.
Preferably, the grain size grading of the alumina is 30-40% of the mass ratio of 10 mu m, 45-50% of the mass ratio of 40 mu m and 10-25% of the mass ratio of 80 mu m.
Through adopting above-mentioned technical scheme, the mode that the aluminium oxide adopts multiple particle diameter to mix, the aluminium oxide of big particle diameter disperses in glass fiber, four needle-like zinc oxide whisker, boron nitride's clearance, help improving the compactibility on modified hollow glass bead surface, thereby improve the thermal conductivity of modified hollow glass bead, improve the speed of heat transfer, little particle diameter aluminium oxide disperses evenly on the coating surface, the gap between big particle diameter aluminium oxide is mainly filled to some little particle diameter aluminium oxide, make more tie points of constitution between the aluminium oxide, constitute inseparable pile structure, increase the heat conduction passageway.
Preferably, the carbon fiber is a pretreated carbon fiber, and the preparation method of the pretreated carbon fiber comprises the following steps: mixing carbon fiber and concentrated nitric acid, performing ultrasonic treatment, vacuum filtering to remove acid, washing to neutrality, and oven drying.
By adopting the technical scheme, the carbon fiber has the characteristics of high strength and high modulus, is uniformly distributed in a cement matrix in a three-dimensional network, can disperse and transfer the stress born by the matrix, and limits the development of microcracks; the carbon fiber surface after ultrasonic treatment of concentrated nitric acid is adhered with a large amount of water-sludge hydration products, and has good compatibility with a cement matrix, enhanced interfacial adhesion and effectively improved strength of the cement matrix.
Preferably, the carbon fiber has a diameter of 20-30 μm and a length of 1-2mm.
Through adopting above-mentioned technical scheme, the carbon fiber of high draw ratio is contacted each other easily, forms the heat conduction passageway, and forms the heat conduction net chain structure easily, is convenient for derive the hydration heat that produces in the cement hydration process, mutually support with four needle-shaped zinc oxide whisker, the boron nitride on modified hollow glass microsphere surface, and then reduce the influence of heat to cement in cement products performance.
Preferably, the grinding aid consists of triisopropanolamine, molasses and 2, 4-dimethylbenzene sulfonic acid according to the mass ratio of (1-2) (2-3) (4-5).
By adopting the technical scheme, the grinding aid is prepared by compounding three components of triisopropanolamine, molasses and 2, 4-dimethylbenzene sulfonic acid, and the proportion of the three components is adjusted so as to achieve the best proportion of the three components; as the grinding aid is added into the cement, ionic bonds of cement particles are broken, and difference of electron density is generated, so that the particles reach a finer state, and the particle size of the cement particles is reduced; triisopropanolamine helps to promote hydration of tetracalcium aluminoferrite, promotes dissolution of iron ions and aluminum ions through complexation, accelerates movement and deposition of the iron ions and the aluminum ions to growth points of hydration products, continuously promotes hydration of tetracalcium aluminoferrite under the action of triisopropanolamine, and helps to enhance the strength of cement; sugar substances in the molasses can be adsorbed on the surfaces of cement particles or hydration products to form a temporary protective film, so that early hydration of cement is inhibited, the induction period is prolonged, the release amount of hydration heat is reduced, the temporary protective film is gradually destroyed in the hydration process, the sugar substances are consumed in the hydration products, the hydration is gradually normal, and the slurry structure is not adversely affected; meanwhile, through adsorption or complexation, hydration products uniformly grow, the structure is compact, and the cement strength is improved.
Preferably, the gypsum is any one of phosphogypsum, lemon gypsum and desulfurized gypsum.
By adopting the technical scheme, when the gypsum is used, the gypsum is used as a retarder to react with tricalcium aluminate, so that the hydration heat of minerals is effectively reduced, and the mechanical property of cement is improved.
In a second aspect, the present application provides a production process of low-heat cement, which adopts the following technical scheme:
a production process of low-heat cement comprises the following steps:
(1) Preparing a mixture: mixing silicate cement clinker, gypsum, fly ash, grinding aid, auxiliary agent and reinforcing agent to obtain a mixture;
(2) And (3) cement preparation: and (3) grinding the mixture obtained in the step (1) together to obtain the composite material.
Through adopting above-mentioned technical scheme, this application cement adopts reasonable raw materials collocation, forms the low-temperature cement that has mechanical properties good, and preparation technology is simple.
Preferably, the mixing blade adopted in the step (1) is a plastic blade.
By adopting the technical scheme, the mixing blade adopted by mixing is a plastic blade, so that the occurrence of magnetization effect in the production process is reduced.
In summary, the present application has the following beneficial effects:
1. according to the low-heat cement, three components of the grinding aid, the auxiliary agent and the reinforcing agent are added in the preparation process, and interact with cement clinker and gypsum, so that on one hand, the hydration heat of cement in the use process is reduced, on the other hand, the hydration heat generated in the cement hydration process is led out conveniently, the heat aggregation in the cement hydration process is reduced, and therefore the influence of the heat on the strength of cement products prepared by cement is reduced.
2. The reinforcing agent for the low-temperature cement is prepared by compounding limestone, modified hollow glass beads and carbon fibers, the limestone and gypsum are matched with each other to participate in the hydration of cement, a hydration product mainly containing single-carbon calcium aluminate is generated, and a hydrated calcium aluminate film is coated on clinker particles, so that the hydration and coagulation of cement clinker are slowed down, the formation of a coagulation structure is delayed, and the formation of a cement slurry compact structure is facilitated; carbon fibers are easy to contact with each other and are matched with the reinforcing agent to form a heat conduction path, so that the carbon fibers are convenient to be matched with the tetrapod-shaped zinc oxide whiskers and the boron nitride on the surfaces of the modified hollow glass microspheres, and the influence of heat on the cement performance is reduced; the modified hollow glass bead adopts a self-made mode, the shell layer contains four needle-shaped zinc oxide whiskers, boron nitride, aluminum oxide heat conduction materials and coating layer materials containing acid ester and perlite, the core layer is a hollow glass bead and basalt fiber mixed material, and the prepared modified hollow glass bead is good in heat resistance, strong in heat conductivity and convenient to reduce the influence of heat on cement performance.
Detailed Description
The present application is described in further detail below with reference to examples.
The procedures, conditions, experimental methods, etc. under which the invention is practiced are common knowledge and knowledge in the art, except for those specifically mentioned below. The protection of the present invention is not limited to the following examples. Variations and advantages that would occur to those skilled in the art are included in the invention without departing from the spirit and scope of the inventive concept.
The raw materials of the examples and comparative examples herein are commercially available in general unless otherwise specified.
The CaO in the limestone is more than or equal to 53 percent, the MgO is less than or equal to 1.2 percent, and the granularity is less than or equal to 25mm.
Molasses of the present application is commercially available.
The polyester resins of the present application are commercially available.
The gypsum of the application is dried at a high temperature of 350 ℃ for 45min.
The Portland cement raw material comprises the following components in percentage by weight: 81.9% of limestone, 3.8% of shale, 8.4% of sandstone and 5.9% of iron powder.
The chemical composition of each raw material of the portland cement raw materials of the present application is shown in table 1.
TABLE 1 chemical composition of raw materials of Portland Cement raw materials
The preparation method of the Portland cement clinker comprises the following steps: mixing limestone, shale, sandstone and iron powder, grinding, calcining at 1400 ℃ for 50min, and cooling to obtain cement clinker.
The mineral composition of the Portland cement clinker comprises the following components in percentage by weight: 45.35% of dicalcium silicate, 31.15% of tricalcium silicate, 2.13% of tricalcium aluminate and 14.17% of tetracalcium aluminoferrite.
Examples
Example 1
The low-heat cement of the embodiment comprises the following raw materials by weight: 70kg of silicate cement clinker, 8kg of gypsum, 5kg of fly ash, 1kg of grinding aid, 3kg of auxiliary agent and 5kg of reinforcing agent; portland cement clinker is commercially available; the grinding aid consists of triisopropanolamine, molasses and 2, 4-dimethylbenzene sulfonic acid according to the mass ratio of 1:2:4; the gypsum is desulfurized gypsum; the auxiliary agent consists of trimethylolethane, coal tar pitch and micro silicon powder according to the mass ratio of 3:2:7; the reinforcing agent consists of limestone, modified hollow glass beads and carbon fibers according to the mass ratio of 1:1:1; the diameter of the carbon fiber is 20 mu m, and the length is 1mm; the preparation method of the modified hollow glass microsphere comprises the following steps: s1, preparing an intermediate: grinding and uniformly mixing basalt fibers and hollow glass beads, adding molten polyester resin, cooling and grinding to obtain an intermediate material I; wherein, the mass ratio of basalt fiber to hollow glass bead to polyester resin is 1:4:7; s2, preparing a second intermediate material: mixing myristic acid, dimethylformamide and thionyl chloride according to a mass ratio of 1:20:3, reacting for 5 hours at 70 ℃ to obtain pretreated myristic acid, mixing galactitol and pretreated myristic acid according to a mass ratio of 1:1, and reacting for 6 hours at 90 ℃ to obtain myristic acid galactose ester; mixing galactose myristate, polyethylene glycol and aluminum oxide according to a mass ratio of 2:1:0.5 to obtain a mixture, mixing the mixture with perlite according to a mass ratio of 1:3 to obtain mixed perlite, standing for 2h under a vacuum condition, and drying to obtain an intermediate material II; s3, producing modified hollow glass beads: dipping the intermediate material I prepared in the step S1 in acrylic emulsion for 20min to obtain a pretreated intermediate material I, mixing the pretreated intermediate material I with the intermediate material II prepared in the step S2, glass fiber, tetrapod-like zinc oxide whisker, boron nitride, phenyl silicone oil and aluminum oxide, and drying to obtain the acrylic emulsion, wherein the mass ratio of the intermediate material I to the acrylic emulsion is 1:5; pretreating a first intermediate material, a second intermediate material, glass fibers, tetrapod-like zinc oxide whiskers, boron nitride, phenyl silicone oil and aluminum oxide in a mass ratio of 3:5:1:2:2:1:3, wherein the drying temperature in the step S3 is 75 ℃, and the drying time is 3 hours; the boron nitride is hexagonal crystal boron nitride; the particle size of the alumina was 40. Mu.m.
The production process of the low-heat cement of the embodiment comprises the following steps: (1) preparation of a mixture: mixing and stirring silicate cement clinker, gypsum, fly ash, grinding aid, auxiliary agent and reinforcing agent, wherein the mixing blade is a plastic blade, so as to obtain a mixture;
(2) And (3) cement preparation: grinding the mixture obtained in the step (1) together, wherein the specific surface area after grinding is 360m 2 /kg。
Example 2
The low-heat cement of this example is different from example 1 in that: the material comprises the following raw materials by weight: 80kg of silicate cement clinker, 9kg of gypsum, 10kg of fly ash, 2kg of grinding aid, 5kg of auxiliary agent and 8kg of reinforcing agent; the grinding aid consists of triisopropanolamine, molasses and 2, 4-dimethylbenzene sulfonic acid according to the mass ratio of 2:3:5; the gypsum is lemon gypsum; the auxiliary agent consists of trimethylolethane, coal tar pitch and micro silicon powder according to the mass ratio of 5:3:8; the carbon fiber had a diameter of 30 μm and a length of 2mm.
Example 3
The low-heat cement of this example is different from example 1 in that: the material comprises the following raw materials by weight: 75kg of silicate cement clinker, 9kg of gypsum, 8kg of fly ash, 2kg of grinding aid, 4kg of auxiliary agent and 7kg of reinforcing agent; the grinding aid consists of triisopropanolamine, molasses and 2, 4-dimethylbenzene sulfonic acid according to the mass ratio of 1:3:4; the gypsum is phosphogypsum; the auxiliary agent is prepared from trimethylolethane, coal tar pitch and micro silicon powder according to a mass ratio of 4:3:7.
Example 4
The low-heat cement of this example is different from that of example 3 in that: the reinforcing agent consists of limestone, modified hollow glass beads and carbon fibers according to the mass ratio of 5:8:2.
Example 5
The low-heat cement of this example is different from that of example 3 in that: the reinforcing agent consists of limestone, modified hollow glass beads and carbon fibers according to the mass ratio of 10:15:3.
Example 6
The low-heat cement of this example is different from that of example 5 in that: the preparation method of the pretreated carbon fiber comprises the following steps: mixing carbon fiber and concentrated nitric acid according to the mass ratio of 1:5, placing the mixture into an ultrasonic cleaner for treatment for 2 hours, vacuum filtering to remove acid, flushing the mixture to be neutral by tap water, and drying the mixture in an oven at the drying temperature of 60 ℃ for 3 hours.
Example 7
The low-heat cement of this example is different from that of example 6 in that: the alumina had a particle size distribution of 30% by mass of 10 μm, 45% by mass of 40 μm and 25% by mass of 80 μm.
Example 8
The low-heat cement of this example is different from that of example 6 in that: the alumina had a particle size distribution of 40% by mass of 10 μm, 50% by mass of 40 μm and 10% by mass of 80 μm.
Comparative example
Comparative example 1
The low-heat cement of this comparative example is different from example 1 in that: no auxiliary agent was added.
Comparative example 2
The low-heat cement of this comparative example is different from example 1 in that: no reinforcing agent was added.
Comparative example 3
The low-heat cement of this comparative example is different from example 1 in that: limestone is adopted to replace the modified hollow glass beads in an equivalent way.
Comparative example 4
The low-heat cement of this comparative example is different from example 1 in that: carbon fiber is adopted to replace the modified hollow glass beads in equal quantity.
Blank control group
The low-heat cement of the blank control group comprises the following raw materials by weight: 70kg of silicate cement clinker and 8kg of gypsum.
Performance test
The hydration heat test method comprises the following steps: the low-heat cement prepared in examples 1 to 8, comparative examples 1 to 4 and the blank control was used to detect the hydration heat of cement according to the detection method in GB/T12959-2008 "method for measuring hydration heat of Cement", and the detection results are shown in Table 2.
Compressive strength performance test: the low-heat cement prepared in examples 1 to 8, comparative examples 1 to 4 and the blank control was tested for compressive strength according to the test method in GB/T17671-1999 method for testing Cement mortar Strength (ISO method), and the test results are shown in Table 2.
TABLE 2 Low-heat cement Performance test results for examples 1-8, comparative examples 1-4, and blank
By combining the example 1 and the blank control group and combining the data in the table 2, it can be seen that the hydration heat of the cement prepared in the example 1 is lower than that of the cement prepared in the blank control group, and the cement prepared in the example 1 is convenient for reducing the hydration heat of the cement by adding the grinding aid, the auxiliary agent, the reinforcing agent and the fly ash, wherein the grinding aid, the auxiliary agent, the reinforcing agent and the fly ash are mutually matched.
As can be seen by combining example 1 and comparative examples 1-2 and combining the data in Table 2, the cement prepared in example 1 has good compressive strength and low heat of hydration, and example 1 differs from comparative examples 1-2 in that: in the embodiment 1, the auxiliary agent and the reinforcing agent are added at the same time, and the auxiliary agent and the reinforcing agent are matched in a synergistic way, so that the release amount of hydration heat is reduced, and the compressive strength of cement is improved.
As can be seen by combining example 1, comparative examples 3-4, and combining the data in table 2, the compressive strength of the cement made in example 1 is superior to that of the cement made in comparative examples 3-4, the heat of hydration of the cement made in example 1 is less, and the difference between example 1 and comparative examples 3-4 is that: the reinforcing agent in the embodiment 1 is prepared by compounding three components of limestone, modified hollow glass beads and carbon fibers, and the three components of limestone, modified hollow glass beads and carbon fibers are mutually matched to cooperate with other components in cement, so that the hydration heat of the cement in the use process is reduced, and the compressive strength of a cement product is improved.
As can be seen by combining examples 1-3 and combining the data in Table 2, the cements produced in examples 1-3 have relatively low heat of hydration and relatively high compressive strength, indicating that the cement raw material composition and raw material formulation of the present application are useful in improving the performance of the cement produced.
In combination with examples 3-5, and with the data in Table 2, it can be seen that the cements produced in examples 4-5 have higher compressive strengths and lower heat of hydration, examples 4-5 differ from example 3 in that: the proportions of the limestone, the modified hollow glass beads and the carbon fiber in examples 4-5 are different, and the proportion of each component of the reinforcing agent has a great influence on the cement performance.
In combination with examples 5-6, and with the data in Table 2, it can be seen that the compressive strength of the cement produced in example 6 is greater than that of the cement produced in example 5, the heat of hydration of the cement produced in example 6 is less than that of the cement produced in example 5, and the difference between example 6 and example 5 is that: the carbon fiber in the embodiment 6 is pretreated, the pretreated carbon fiber has better binding property with other components in the cement, so that the compressive strength of the cement is improved, and meanwhile, the hydration heat of the cement is reduced.
In connection with examples 6-8, and in connection with the data in Table 2, it can be seen that the cements produced in examples 7-8 have higher compressive strengths and lower heats of hydration, examples 7-8 differ from example 6 in that: the zinc oxide of the outer layer of the modified hollow glass bead adopts raw materials with different grain size grades, so that the prepared modified hollow glass bead has better performance and is convenient for better improving the performance of cement.
The present embodiment is merely illustrative of the present application and is not limiting of the present application, and modifications may be made to the present embodiment without creative contribution as needed by a person skilled in the art after reading the present specification.
Claims (10)
1. The low-heat cement is characterized by being prepared from the following raw materials in parts by weight: 70-80 parts of silicate cement clinker, 8-9 parts of gypsum, 5-10 parts of fly ash, 1-2 parts of grinding aid, 3-5 parts of auxiliary agent and 5-8 parts of reinforcing agent, wherein the auxiliary agent comprises trimethylolethane, coal tar pitch and silica fume, and the reinforcing agent comprises limestone, modified hollow glass beads and carbon fiber; the preparation method of the modified hollow glass microsphere comprises the following steps: s1, preparing an intermediate: grinding and uniformly mixing basalt fibers and hollow glass beads, adding molten polyester resin, cooling and grinding to obtain an intermediate material I; s2, preparing a second intermediate material: mixing myristic acid, dimethylformamide and thionyl chloride, reacting to obtain pretreated myristic acid, mixing galactitol with pretreated myristic acid, and reacting to obtain myristic acid galactose ester; mixing galactose myristate, polyethylene glycol and aluminum oxide to obtain a mixture, mixing the mixture with perlite to obtain mixed perlite, standing under vacuum condition, and drying to obtain an intermediate material II; s3, producing modified hollow glass beads: and (3) immersing the intermediate material I prepared in the step (S1) in acrylic emulsion to obtain a pretreated intermediate material I, mixing the pretreated intermediate material I with the intermediate material II prepared in the step (S2), glass fibers, tetrapod-like zinc oxide whiskers, boron nitride, phenyl silicone oil and aluminum oxide, and drying to obtain the modified acrylic emulsion.
2. The low-heat cement according to claim 1, wherein the reinforcing agent consists of limestone, modified hollow glass microspheres and carbon fibers in a mass ratio of (5-10): (8-15): (2-3).
3. The low heat cement according to claim 2, wherein the auxiliary agent consists of trimethylolethane, coal tar pitch and silica fume in the mass ratio of (3-5): 2-3): 7-8.
4. A low heat cement according to claim 2, wherein the alumina has a particle size grading of 10 μm with a mass ratio of 30-40%, 40 μm with a mass ratio of 45-50% and 80 μm with a mass ratio of 10-25%.
5. The low heat cement according to claim 2, wherein the carbon fiber is a pretreated carbon fiber, and the method for preparing the pretreated carbon fiber comprises the steps of: mixing carbon fiber and concentrated nitric acid, performing ultrasonic treatment, vacuum filtering to remove acid, washing to neutrality, and oven drying.
6. The low heat cement according to claim 5, wherein the carbon fiber has a diameter of 20 to 30 μm and a length of 1 to 2mm.
7. The low-heat cement according to claim 1, wherein the grinding aid consists of triisopropanolamine, molasses and 2, 4-dimethylbenzenesulfonic acid in a mass ratio of (1-2): (2-3): (4-5).
8. The low heat cement according to claim 1, wherein the gypsum is any one of phosphogypsum, lemon gypsum and desulfurized gypsum.
9. A process for the production of a low-heat cement according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
(1) Preparing a mixture: mixing silicate cement clinker, gypsum, fly ash, grinding aid, auxiliary agent and reinforcing agent to obtain a mixture;
(2) And (3) cement preparation: and (3) grinding the mixture obtained in the step (1) together to obtain the composite material.
10. The process for producing low-heat cement according to claim 9, wherein: and (3) the mixing blade adopted in the step (1) is a plastic blade.
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| GB1237844A (en) * | 1968-12-30 | 1971-06-30 | Monsanto Co | Reinforced polymer compositions |
| CN1061014A (en) * | 1991-12-03 | 1992-05-13 | 张永明 | Hollow centered microbead portland cement |
| CN108101460A (en) * | 2017-12-26 | 2018-06-01 | 肖彬 | A kind of road pervious concrete and its production technology |
| CN116514420A (en) * | 2022-05-12 | 2023-08-01 | 中国建筑材料科学研究总院有限公司 | Low-hydration heat toughness well cementation cement |
| CN116715455A (en) * | 2023-06-20 | 2023-09-08 | 中国建筑材料科学研究总院有限公司 | High-crack-resistance low-heat silicate cement and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1237844A (en) * | 1968-12-30 | 1971-06-30 | Monsanto Co | Reinforced polymer compositions |
| CN1061014A (en) * | 1991-12-03 | 1992-05-13 | 张永明 | Hollow centered microbead portland cement |
| CN108101460A (en) * | 2017-12-26 | 2018-06-01 | 肖彬 | A kind of road pervious concrete and its production technology |
| CN116514420A (en) * | 2022-05-12 | 2023-08-01 | 中国建筑材料科学研究总院有限公司 | Low-hydration heat toughness well cementation cement |
| CN116715455A (en) * | 2023-06-20 | 2023-09-08 | 中国建筑材料科学研究总院有限公司 | High-crack-resistance low-heat silicate cement and preparation method thereof |
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