Method for preparing concrete enhancer by utilizing nickel slag

A concrete reinforcing agent and reinforcing agent technology, which is applied in the field of building materials, can solve the problems of reduced concrete strength, high price, and reduced concrete durability in the later stage, and achieve the improvement of later compressive strength and early compressive strength. The formula and simplicity Effect

Inactive Publication Date: 2014-06-18
福建源鑫环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of these organic salt accelerators, they are rarely used in my country at present.
[0007] Although most traditional accelerators can significantly increase the early strength of concrete, the later strength of concrete will be reduced to a certain extent, and the durability of concrete will be reduced to a certain extent.

Method used

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  • Method for preparing concrete enhancer by utilizing nickel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) The ratio of the reinforcing agent is (percentage by weight): nickel slag / formic acid=1:1;

[0020] (2) The concentration of formic acid is 10%;

[0021] (3) Reaction conditions: temperature is 20°C; time is 24h.

[0022] Add the above prepared reinforcing agents to concrete, and the 1d, 3d, 7d, 28d and 90d compressive strength increase effects are shown in Table 1.

Embodiment 2

[0024] (1) The ratio of reinforcing agent is (percentage by weight): nickel slag / formic acid=1.2:1;

[0025] (2) The concentration of formic acid is 15%;

[0026] (3) Reaction conditions: temperature is 40°C; time is 10h.

[0027] Add the above prepared reinforcing agents to concrete, and the 1d, 3d, 7d, 28d and 90d compressive strength increase effects are shown in Table 1. Example 3

Embodiment 3

[0028] (1) The ratio of reinforcing agent is (weight percent): nickel slag / formic acid=1.4:1;

[0029] (2) The concentration of formic acid is 10%;

[0030] (3) Reaction conditions: temperature is 30°C; time is 12h.

[0031] Add the above prepared reinforcing agents to concrete, and the 1d, 3d, 7d, 28d and 90d compressive strength increase effects are shown in Table 1.

[0032] Table 1 Contrast of concrete compressive strength before and after using the present invention

[0033]

[0034] Note: The concrete mix ratio is W / C ratio of 0.60, and the dosage of 42.5 ordinary silicate cement is 400kg / m 3 , The sand rate is 35%.

[0035] As can be seen from Table 1, the reinforcing agent product of the present invention not only has a significant strengthening effect on the concrete 1d-7d compressive strength, and the 28d-90d compressive strength will not shrink back, but still has a greater strengthening effect. Among them, the compressive strength of concrete 1d, 3d, 7d, 28d...

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Abstract

The invention belongs to the technical field of building materials and in particular relates to a method for preparing a concrete enhancer by utilizing nickel slag. The method is characterized by uniformly adding the nickel slag to 5-45wt% of formic acid solution and reacting at 20-80 DEG C for 1-24 hours, thus preparing the enhancer, wherein the mass ratio of the nickel slag to formic acid is (0.5-4.0):1. The method has the obvious advantages that after the enhancer is mixed in concrete according to 1.0-5.0% of the mass of cement or cementing materials, the early compressive strength of the concrete can be obviously improved, and the later compressive strength is also greatly improved; the enhancer can be widely applied to Portland cement-based materials such as slurry, mortar and concrete; the method is simple in formula and production process and is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing a concrete reinforcing agent by utilizing nickel slag. Background technique [0002] In order to speed up the construction progress of concrete works and shorten the demoulding time, early strength agents are often used, especially in northern regions. In addition, in the production of cement products, early-strength admixtures are commonly used in order to stretch steel bars as soon as possible, speed up formwork turnover and pedestal utilization. Indeed, the use of early-strength admixtures in actual engineering can play an important role in improving concrete performance, improving construction efficiency and saving investment costs. [0003] Accelerators can be divided into three categories according to their chemical composition: inorganic salts, organic substances, and composite early strength agents combined with organic and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/04
Inventor 杨全兵陈必松陈尚鸿陈尚霖
Owner 福建源鑫环保科技有限公司
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