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Preparation method of early-strength quick-hardening cement mortar

A rapid-hardening cement and mortar technology, applied in the field of concrete, can solve the problems of easy corrosion of stressed steel bars, slow hydration reaction, low mold release strength, etc., achieve good impermeability and freeze-thaw resistance, and no loss of strength in the later stage , surface compact effect

Pending Publication Date: 2021-12-24
界首市宝业瑞祥建筑工业化有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are a large number of small components in the production process of prefabricated components. The size of the components and the amount of concrete are relatively small, and they do not belong to the stressed components of the building in the composition of the building. The small components have higher requirements on the demoulding strength of the components. The amount of concrete used is small, which leads to the small heat storage of the component itself and the slow hydration reaction, which in turn prolongs the demoulding time due to the low demoulding strength, and the cement mortar is easy to corrode the reinforced steel bar when it comes into contact with the stressed steel bar

Method used

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  • Preparation method of early-strength quick-hardening cement mortar

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Embodiment 1

[0030] This embodiment is a preparation method of early-strength rapid-hardening cement mortar, comprising the following components in parts by weight:

[0031] 1 part of ordinary cement, 0.05 part of sulfoaluminate cement, 1.5 part of yellow sand, 0.003 part of admixture, 0.4 part of water, 0.001 part of rust inhibitor;

[0032] The preparation method of this early-strength quick-hardening cement mortar comprises the following steps:

[0033] S1: Pour the weighed tap water and admixture into the mixing bucket for simple stirring;

[0034] S2: Add ordinary cement, sulphoaluminate cement and yellow sand while stirring, control the adding time within 1 minute, continue stirring for 2 minutes after adding, and constantly change the stirring position during the stirring process to prevent the raw materials from sinking to the bottom;

[0035] S3: Add the rust inhibitor while stirring, control the stirring teeth to stay in the slurry all the time during the stirring process, and s...

Embodiment 2

[0043] This embodiment is a preparation method of early-strength rapid-hardening cement mortar, comprising the following components in parts by weight:

[0044] 1 part of ordinary cement, 0.05 part of sulfoaluminate cement, 2 parts of yellow sand, 0.005 part of admixture, 0.4 part of water, 0.002 part of rust inhibitor;

[0045] The preparation method of this early-strength quick-hardening cement mortar comprises the following steps:

[0046] S1: Pour the weighed tap water and admixture into the mixing bucket for simple stirring;

[0047] S2: Add ordinary cement, sulphoaluminate cement and yellow sand while stirring, control the adding time within 1 minute, continue stirring for 2 minutes after adding, and constantly change the stirring position during the stirring process to prevent the raw materials from sinking to the bottom;

[0048] S3: Add the rust inhibitor while stirring, control the stirring teeth to stay in the slurry all the time during the stirring process, and st...

Embodiment 3

[0056] This embodiment is a preparation method of early-strength rapid-hardening cement mortar, comprising the following components in parts by weight:

[0057] 1 part of ordinary cement, 0.1 part of sulfoaluminate cement, 2 parts of yellow sand, 0.005 part of admixture, 0.5 part of water, 0.002 part of rust inhibitor;

[0058] The preparation method of this early-strength quick-hardening cement mortar comprises the following steps:

[0059] S1: Pour the weighed tap water and admixture into the mixing bucket for simple stirring;

[0060] S2: Add ordinary cement, sulphoaluminate cement and yellow sand while stirring. The time for adding the materials is controlled within 2 minutes. After the addition, continue to stir for 3 minutes. During the stirring process, the stirring position should be constantly changed to prevent the raw materials from sinking to the bottom;

[0061] S3: Add the rust inhibitor while stirring, control the stirring teeth to always be in the slurry durin...

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Abstract

The invention discloses a preparation method of early-strength quick-hardening cement mortar, and relates to the field of concrete. The preparation method comprises the steps that tap water and an additive are poured into a stirring barrel to be simply stirred, ordinary cement, sulphoaluminate cement and yellow sand are added while stirring is conducted, a corrosion inhibitor is added while stirring is conducted, the mixed slurry is poured into a mold, standing curing and natural curing are conducted, after demoulding into storage, regular watering maintenance is carried out to obtain the early-strength quick-hardening cement mortar. By preparing the early-strength quick-hardening cement mortar, the problem that the demoulding time of a component is prolonged due to small heat storage capacity and slow hydration reaction is solved; the demolding time of the early-strength quick-hardening cement mortar component can be advanced by 5-6 hours, the surface of the early-strength quick-hardening cement mortar component is denser, air holes are fewer, the probability of shrinkage cracks is lower, calcium hydroxide can react with the aluminum sulfate component to generate ettringite, and therefore the purposes of coagulation acceleration and early strength are achieved, the later strength of the component is not lost, and the anti-permeability and freeze-thaw resistance are better.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a preparation method of early-strength rapid-hardening cement mortar. Background technique [0002] There are a large number of small components in the production process of prefabricated components. The size of the components and the amount of concrete are relatively small, and they do not belong to the stressed components of the building in the composition of the building. The small components have higher requirements on the demoulding strength of the components. The amount of concrete used is small, which leads to the small heat storage of the component itself and the slow hydration reaction, which in turn prolongs the demoulding time due to the low demoulding strength, and the cement mortar is easy to corrode the reinforced steel bar when it comes into contact with the stressed steel bar. [0003] To this end, we propose a preparation method for early-strength and fast-hardening cemen...

Claims

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Application Information

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IPC IPC(8): C04B28/06C07D233/02C07D233/06C04B24/12C04B103/61
CPCC04B28/06C07D233/02C07D233/06C04B24/128C04B2103/61C04B2201/50C04B14/068C04B24/18C04B22/085
Inventor 周水明吕钦刚董伟良曹磊项水强应彬
Owner 界首市宝业瑞祥建筑工业化有限公司
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