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Preparation process of imitation cement with high bending modulus

A flexural modulus and cement preparation technology, which is applied in the field of high-strength material preparation, can solve problems such as easy fracture, short service life, and low flexural modulus

Pending Publication Date: 2021-12-07
河南四通集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high flexural modulus imitation cement preparation process, through modified resin and reinforcing liquid, to solve the low flexural modulus of cement materials at the present stage, easy to break after being squeezed by external force, and at the same time avoid The existing imitation cement has the problems of short service life and poor high temperature resistance

Method used

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  • Preparation process of imitation cement with high bending modulus
  • Preparation process of imitation cement with high bending modulus
  • Preparation process of imitation cement with high bending modulus

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A process for preparing imitation cement with a high flexural modulus. The anti-cement includes the following raw materials in parts by weight: 30 parts of limestone, 5 parts of clay, 10 parts of silicon micropowder, 30 parts of modified resin, and 6 parts of reinforcing liquid;

[0035] The imitation cement is prepared by compression molding at a temperature of 60° C. after the above-mentioned raw materials are uniformly blended.

[0036] Described modified resin is made by following steps:

[0037] Step A1: Add pyromellitic dianhydride, 4,4'-diaminodiphenyl sulfone, and N,N-dimethylformamide into the reaction kettle at a speed of 150r / min and a temperature of 0°C , after stirring for 10 minutes, the temperature was raised to 20°C, and the reaction was carried out for 2 hours to obtain intermediate 1. After mixing intermediate 1, paraformaldehyde, p-aminophenol, and N,N-dimethylformamide, the The rotation speed is 200r / min and the temperature is 100°C. After the reactio...

Embodiment 2

[0045] A process for preparing imitation cement with a high flexural modulus. The anti-cement includes the following raw materials in parts by weight: 40 parts of limestone, 8 parts of clay, 13 parts of silicon micropowder, 50 parts of modified resin, and 10 parts of reinforcing liquid;

[0046] The imitation cement is prepared by compression molding at a temperature of 65° C. after the above-mentioned raw materials are uniformly blended.

[0047] Described modified resin is made by following steps:

[0048] Step A1: Add pyromellitic dianhydride, 4,4'-diaminodiphenyl sulfone, and N,N-dimethylformamide into the reaction kettle at a speed of 180r / min and a temperature of 3°C After stirring for 13 minutes, the temperature was raised to 23°C, and the reaction was carried out for 2.5 hours to obtain intermediate 1. After mixing intermediate 1, paraformaldehyde, p-aminophenol, and N,N-dimethylformamide, Under the condition that the rotation speed is 200r / min and the temperature is ...

Embodiment 3

[0056] A process for preparing imitation cement with high flexural modulus. The anti-cement includes the following raw materials in parts by weight: 50 parts of limestone, 10 parts of clay, 15 parts of silicon micropowder, 60 parts of modified resin, and 12 parts of reinforcing liquid;

[0057] The imitation cement is prepared by compression molding at a temperature of 70° C. after the above-mentioned raw materials are uniformly blended.

[0058] Described modified resin is made by following steps:

[0059] Step A1: Add pyromellitic dianhydride, 4,4'-diaminodiphenyl sulfone, and N,N-dimethylformamide into the reaction kettle at a speed of 200r / min and a temperature of 5°C , after stirring for 15 minutes, the temperature was raised to 25°C, and the reaction was carried out for 3 hours to obtain intermediate 1. After mixing intermediate 1, paraformaldehyde, p-aminophenol, and N,N-dimethylformamide, the The rotating speed is 300r / min and the temperature is 110°C. After the react...

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Abstract

The invention discloses a preparation process of imitation cement with high bending modulus. The imitation cement is prepared from the following raw materials in parts by weight: 30 to 50 parts of limestone, 5 to 10 parts of clay, 10 to 15 parts of silica powder, 30 to 60 parts of modified resin and 6 to 12 parts of reinforcing liquid. Molecules of the modified resin contain a plurality of multi-carbon long chains, so that the toughness of the prepared modified resin is improved. Meanwhile, the molecular chains contain sulfone structures, so that the oxidation resistance of the resin is improved, the service life of the imitation cement is further prolonged, and the prepared imitation cement is better in heat-resistant effect at the same time due to the benzoxazine structures on the molecular chains. Amino groups on the reinforced particles can react with residual epoxy groups on modified resin molecules, so that the reinforced particles are grafted with the modified resin, the composite material of the carbon fibers and the graphene has good mechanical properties, and the bending grinding amount of the imitation cement is further improved.

Description

technical field [0001] The invention relates to the technical field of high-strength material preparation, in particular to a preparation process for imitation cement with high flexural modulus. Background technique [0002] Cement concrete is the most widely used civil engineering material, but it is also a typical quasi-brittle material. High brittleness is an inherent shortcoming of cement concrete, and it is one of the main reasons for cracking of concrete structures, structural failure and deterioration of durability. Improving the brittleness and toughness of cement concrete has long been the focus and difficulty of academic and engineering circles. [0003] The current technical measures to improve the brittleness of concrete mainly include the use of fiber toughening and polymer emulsion modification. Fiber toughening technology forms a good bonding effect between short fine fibers and cement matrix in concrete. When the cement stone is damaged, it uses its high te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/06C08K7/06C08K3/36C08K3/34C08K3/26C08K13/06
CPCC08K9/06C08K7/06C08K3/36C08K3/346C08K3/26C08K13/06C08K2003/265C08L63/00
Inventor 谷晓雷
Owner 河南四通集团有限公司