A kind of high-strength concrete and its preparation process

A concrete, high-strength technology, applied in the direction of organic chemistry, etc., can solve the problems of high-strength concrete shrinkage, cracks, temperature rise of high-strength concrete, etc., achieve high flexural and compressive strength, long service life, and reduce hydration. heat effect

Active Publication Date: 2022-06-14
宁波龙峰混凝土有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-strength concrete uses high-strength cement, and the high-strength cement generates a lot of heat during the hydration process, causing the temperature inside the high-strength concrete to rise, which causes the high-strength concrete to lose water and shrink, resulting in cracks

Method used

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  • A kind of high-strength concrete and its preparation process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]A high-strength concrete, comprising the following components made of: 80kg of cement, 60kg of coarse aggregate, 70kg of fine aggregate, 5kg of calixpyrrole modified nanoboron fibers, 2,5 kg of bromosuccinic acid ionization modification -Bis(diethylamino)phenyl-1,3,4-oxadiazole 1kg, carboxyl-containing hyperbranched poly(amine-ester) acrylic acid 0.5kg, zeolite powder 5kg, boron carbide ceramic powder 2kg, attapulgite 10kg , Carboxyl-terminated liquid nitrile rubber 1kg, water 40kg.

[0028] The preparation method of the calixpyrrole-modified nano-boron fibers includes the following steps: dispersing the nano-boron fibers in an organic solvent, then adding a silane coupling agent KH560 to it, stirring at 60° C. for 3 hours, and then adding to it Meso-tetramethyl-meso-tetraaminophenylcalix[4]pyrrole and basic catalyst were stirred and reacted at 60°C for 2 hours. After the reaction, the solvent was removed by rotary evaporation to obtain calixpyrrole modified nanoboron fi...

Embodiment 2

[0035] A high-strength concrete, comprising the following components made of: 85kg of cement, 65kg of coarse aggregate, 72kg of fine aggregate, 6kg of calixpyrrole modified nanoboron fibers, 2,5 kg of bromosuccinic acid ionization modification -Bis(diethylamino)phenyl-1,3,4-oxadiazole 1.5kg, carboxyl-containing hyperbranched poly(amine-ester) acrylic acid 0.7kg, zeolite powder 6kg, boron carbide ceramic powder 2.5kg, attapulgite Soil 11kg, carboxyl-terminated liquid nitrile rubber 1.2kg, water 45kg.

[0036] The preparation method of the calixpyrrole-modified nanoboron fiber comprises the following steps: dispersing the nanoboron fiber in an organic solvent, then adding a silane coupling agent KH560 thereto, stirring at 65° C. for 3.5 hours, and then adding to it Meso-tetramethyl-meso-tetraaminophenyl calix[4]pyrrole and basic catalyst were stirred and reacted at 65° C. for 2.5 hours. After the reaction, the solvent was removed by rotary evaporation to obtain calixpyrrole modi...

Embodiment 3

[0043] A high-strength concrete, comprising the components of the following qualities: 90kg of cement, 70kg of coarse aggregate, 75kg of fine aggregate, 6.5kg of calixpyrrole-modified nano-boron fibers, and ionized modified bromosuccinic acid 2, 5-bis(diethylamino)phenyl-1,3,4-oxadiazole 2kg, carboxyl-containing hyperbranched poly(amine-ester) acrylic acid 0.8kg, zeolite powder 6.5kg, boron carbide ceramic powder 3kg, attapulgite Soil 13kg, carboxyl-terminated liquid nitrile rubber 1.5kg, water 50kg.

[0044] The preparation method of the calixpyrrole-modified nano-boron fiber includes the following steps: dispersing the nano-boron fiber in an organic solvent, then adding a silane coupling agent KH560 to it, stirring at 70° C. for 4 hours, and then adding to it Meso-tetramethyl-meso-tetraaminophenylcalix[4]pyrrole and basic catalyst were stirred and reacted at 70°C for 3 hours. After the reaction, the solvent was removed by rotary evaporation to obtain calixpyrrole modified na...

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Abstract

The invention discloses a high-strength concrete, which comprises the following components in parts by weight: 80-100 parts of cement, 60-80 parts of coarse aggregate, 70-80 parts of fine aggregate, calixyrrole modified nano 5-8 parts of boron fiber, 1-3 parts of bromosuccinic acid ionized modified 2,5-bis(diethylamino)phenyl-1,3,4-oxadiazole, hyperbranched poly( Amine-ester) 0.5-1 part of acrylic acid, 5-8 parts of zeolite powder, 2-4 parts of boron carbide ceramic powder, 10-15 parts of attapulgite, 1-2 parts of carboxyl-terminated liquid nitrile rubber, 40-60 parts of water . The invention also discloses a preparation process of the high-strength concrete. The high-strength concrete disclosed by the invention has high flexural and compressive strength, sufficient toughness and long service life through the cooperation and mutual action of various components.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength concrete and a preparation process thereof. Background technique [0002] With the development of urban construction, the use of concrete has become more and more extensive. Concrete is one of the most important civil engineering materials in contemporary times; it is made up of cementitious materials, granular aggregates, water, and admixtures and admixtures added when necessary in a certain proportion, uniformly stirred, compactly formed, and cured. A hardened artificial stone. As buildings have higher and higher requirements for the strength of concrete itself, high-strength concrete has also emerged as the times require. [0003] Most of the existing high-strength concrete needs to consume a lot of cement, the cost is relatively high, and the pollution to the environment is relatively large. They also generally have high compressive strength, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B20/02C04B24/26C04B24/28C04B24/12C07D271/107C04B14/48
CPCC04B28/04C04B20/023C04B24/2652C04B24/282C04B24/005C07D271/107C04B2201/50C04B2201/52C04B14/28C04B14/06C04B14/48C04B14/047C04B14/102C04B14/323
Inventor 许明泉陈立袁晓玲孔浩峰胡佳聪
Owner 宁波龙峰混凝土有限公司
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