Low-negative-temperature cement-based rapid repair material

A repair material, cement-based technology, applied in the field of materials, can solve the problems of slow hydration and low strength, and achieve the effects of improving slow hydration, increasing strength and shortening demoulding time.

Pending Publication Date: 2020-11-27
TIANJIN JUSHI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a low negative temperature cement-based rapid repair material, which can prepare frost-resistant concrete with higher early hourly strength, and can improve the problems of slow hydration and low strength in low temperature environments

Method used

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Experimental program
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Embodiment 1

[0020] Embodiment 1 The components are synthesized according to the following parts by weight: 300 parts of ordinary portland cement, 300 parts of sulphoaluminate cement, 0 part of aluminate cement, 740 parts of medium sand, 1022 parts of crushed stone, 2.5 parts of water, 10 parts of antifreeze, 0.1 part of retarder, 0.5 part of accelerator, and 165 parts of water.

Embodiment 2

[0021] Embodiment 2 Each component synthesizes the repair material according to the following parts by weight: 300 parts of ordinary portland cement, 0 part of sulphoaluminate cement, 300 parts of aluminate cement, 740 parts of medium sand, 1022 parts of crushed stone, 2.5 parts of water, 10 parts of antifreeze, 0.1 part of retarder, 0.5 part of accelerator, and 165 parts of water.

Embodiment 3

[0022] Embodiment 3 The components are synthesized according to the following parts by weight: 0 parts of ordinary portland cement, 600 parts of sulphoaluminate cement, 0 part of aluminate cement, 735 parts of medium sand, 973 parts of crushed stone, 1.5 parts of water, 10 parts of antifreeze, 0.5 parts of retarder, 0.5 parts of accelerator, and 180 parts of water.

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Abstract

The invention provides a low-negative-temperature cement-based rapid repair material. The material comprises the following components in parts by weight: 80 to 160 parts of ordinary Portland cement, 310 to 420 parts of sulphoaluminate cement, 320 to 410 parts of aluminate cement, 736 to 734 parts of fine aggregate, 989 to 1011 parts of coarse aggregate, 1.8 to 2.1 parts of a water reducing agent,7 to 11 parts of an anti-freezing agent, 0.2 to 0.4 part of a retarder and 0.3 to 0.7 part of a coagulation accelerator. Compared with an ordinary Portland cement system, the repair material providedby the invention has the effects of accelerating setting and hardening, shortening the demolding time, improving the early strength and increasing the later strength, and alleviating the problems of slow hydration and low strength in a low-temperature environment.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a low negative temperature cement-based quick repair material. Background technique [0002] In a low temperature environment, such as in a cold storage, the concrete floor has undergone multiple freeze-thaw cycles, and the original floor has been damaged to varying degrees or even severely damaged. Problems such as peeling, potholes, pockmarks, cracking, and frost heave occurred, which seriously affected the normal use of the cold storage floor when transporting goods. During the process of pouring concrete for repair, the material will be affected by the low temperature and freeze, the hydration rate of the material will be slower, and the strength will be reduced. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a low negative temperature cement-based rapid repair material, which can prepare frost-resistant concr...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B111/76
CPCC04B28/065C04B2111/76C04B7/02C04B2103/302C04B2103/22C04B2103/12C04B22/002C04B2103/601C04B14/06C04B14/068C04B14/28C04B14/14C04B14/048
Inventor 刘博
Owner TIANJIN JUSHI TECH DEV
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