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Easy-to-flow composite mineral admixture, preparation method thereof and mortar prepared from admixture

A technology of composite minerals and admixtures, which is applied in the field of easy-flowing composite mineral admixtures and its preparation method and the mortar prepared by using the admixtures, can solve the problems of large concrete shrinkage, reduction of concrete water-binder ratio, and mineral powder requirements. Low water volume and other problems, achieve high compressive strength, improve fluidity, and good fluidity

Active Publication Date: 2020-04-28
江苏盐砼新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low water demand of mineral powder, it can reduce the water-binder ratio of concrete, increase the fluidity of concrete, be easy to pump, and improve the workability of concrete, but it is also easy to cause adverse effects such as large shrinkage and bleeding of concrete.

Method used

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  • Easy-to-flow composite mineral admixture, preparation method thereof and mortar prepared from admixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The raw materials included in the easy-flowing composite mineral admixture are shown in Table 1 below. Among them, the grinding aid is a mixture of 80 parts of silicone resin and 20 parts of sodium polyacrylate dispersant, accounting for 0.2% of the sum of mineral powder, fly ash floating beads and quartz sand tailings.

[0020] The admixture component of table 1 embodiment 1

[0021] raw material mineral powder Fly ash floating beads Quartz sand tailings Content / part 40 40 20

[0022] The preparation method of the easy-flowing composite mineral admixture comprises the steps of: putting mineral powder, quartz sand tailings and grinding aids into a ball mill, and grinding until the screening amount of a 45 μm square hole sieve is less than 12%. The raw material was dried in an oven at 105°C, and after cooling, it was mixed evenly with fly ash floating beads in a V-type mixer to obtain an easy-flowing composite mineral admixture.

[0023] The ...

Embodiment 2

[0028] The raw materials included in the easy-flowing composite mineral admixture are shown in Table 3 below. Among them, the grinding aid is a mixture of 80 parts of silicone resin and 20 parts of sodium polyacrylate dispersant, accounting for 0.3% of the sum of mineral powder, fly ash floating beads and quartz sand tailings.

[0029] The admixture component of table 3 embodiment 2

[0030] raw material mineral powder Fly ash floating beads Quartz sand tailings Content / part 60 20 20

[0031] The preparation method of the easy-flowing composite mineral admixture comprises the steps of: putting mineral powder, quartz sand tailings and grinding aids into a ball mill, and grinding until the screening amount of a 45 μm square hole sieve is less than 12%. The raw material was dried in an oven at 105°C, and after cooling, it was mixed evenly with fly ash floating beads in a V-type mixer to obtain an easy-flowing composite mineral admixture.

[0032] The ...

Embodiment 3

[0037] The raw materials included in the easy-flowing composite mineral admixture are shown in Table 5 below. Among them, the grinding aid is a mixture of 80 parts of silicone resin and 20 parts of sodium polyacrylate dispersant, accounting for 0.4% of the sum of mineral powder, fly ash floating beads and quartz sand tailings.

[0038] The admixture component of table 5 embodiment 3

[0039] raw material mineral powder Fly ash floating beads Quartz sand tailings Content / part 50 30 20

[0040] The preparation method of the easy-flowing composite mineral admixture comprises the steps of: putting mineral powder, quartz sand tailings and grinding aids into a ball mill, and grinding until the screening amount of a 45 μm square hole sieve is less than 12%. The raw material was dried in an oven at 105°C, and after cooling, it was mixed evenly with fly ash floating beads in a V-type mixer to obtain an easy-flowing composite mineral admixture.

[0041] The ...

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Abstract

The invention discloses an easy-to-flow composite mineral admixture, a preparation method thereof and mortar prepared from the admixture. The admixture comprises mineral powder, fly ash floating beads, quartz sand tailings and a grinding aid. The preparation method comprises the following steps: mixing the mineral powder, the quartz sand tailings and the grinding aid, grinding, drying, cooling, adding the fly ash floating beads, and uniformly mixing to obtain the admixture. The mortar comprises water, cement, sand and the admixture. The mineral powder, the fly ash floating beads and the quartzsand tailings are compounded, and the grinding aid is combined so that the mortar fluidity of the prepared composite mineral admixture can be effectively improved, and the use standard of JG / T486-2015 Composite Admixture for Concrete (the activity index is greater than or equal to 65% in 7d and 28d, and the flow ratio is greater than or equal to 110%) is met.

Description

technical field [0001] The invention belongs to the field of mortar preparation, and in particular relates to an easy-flowing composite mineral admixture, a preparation method thereof and mortar prepared by using the admixture. Background technique [0002] At present, a large amount of cement is used in concrete, and the cement has high emission and high energy consumption problems in the production process, and the production cost is also high. Adding some industrial processing waste to concrete, such as slag powder, fly ash floating beads, silicon-containing tailings, etc. to replace part of the cement, can not only effectively control the amount of cement, reduce production costs, but also realize waste utilization and reduce these solid wastes pollution of the environment. Recently, research on the use of these wastes as mineral admixtures for cement concrete has been carried out. Studies have shown that these admixtures can react slowly with cement hydration products ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/30C04B24/42
CPCC04B28/00C04B40/0039C04B2111/00017C04B14/06C04B18/141C04B18/082C04B18/12C04B24/42C04B24/26Y02W30/91
Inventor 朱研吴其胜罗乃将朱宝贵李云杰唐婷婷吴浩吴思玥
Owner 江苏盐砼新材料科技有限公司
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