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Concrete with improved construction performance and preparation method thereof

A technology of construction performance and concrete, which is applied in the field of building materials and its preparation, and can solve problems such as short setting time and long setting time

Active Publication Date: 2015-02-25
福建科胜加固材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, often the concrete ingredients with long construction time have a long setting time, and the concrete ingredients with short construction time have short setting time.

Method used

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  • Concrete with improved construction performance and preparation method thereof
  • Concrete with improved construction performance and preparation method thereof
  • Concrete with improved construction performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1-1

[0029] 180 grams of methyl vinyl polyoxyethylene ether (molecular weight is 1000-2000) and 122 grams of soft water are dropped into the reactor, the temperature is raised to 35 ° C, and then 0.5 gram of dicumyl peroxide is added to make the bottom material;

[0030] Add 2.5 grams of dipolycyanamide, 15 grams of acrylic acid, 60 grams of demineralized water and 0.45 grams of mercaptopropionic acid in the batching kettle to make A material, which is pumped to the metering tank for subsequent use.

[0031] Add 105 grams of demineralized water and 0.1 gram of sodium bisulfite formaldehyde in another batching still, be made into B material, be pumped to metering tank, standby.

[0032] Add material A and material B dropwise to the bottom material at a constant speed, the dropping time of material A is 180 minutes, and the delivery time of material B is 210 minutes. After the dropping is completed, keep warm for 90 minutes. Subsequently, 9 g of 32% aqueous sodium hydroxide solution ...

preparation Embodiment 1-2

[0034] Other steps are the same as in Example 1-1, except that dipolycyanamide is replaced with oleylamine. The yield was 97%.

preparation Embodiment 1-3

[0036] Other steps are the same as in Example 1-1, except that oleoylethanolamine is used instead of dicyandiamide. The yield was 96%.

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Abstract

The invention provides concrete with improved construction performance. The concrete comprises, in parts by weight, 400-500 parts of cement clinker, 10-20 parts of an expanding agent, 80-120 parts of gypsum, 1-2 parts of a pH value adjusting agent, 8-10 parts of a water reducer, 300-400 parts of quartz sand, and 50-100 parts of furnace slag. The water reducer comprises methyl vinyl polyoxyethylene ether, water, acrylic acid, an oxidant, an amine promoter, a chain transfer agent, formaldehydehydrosulfite (also named as rongalite) and an alkali. The concrete is high in strength and good in construction performance.

Description

technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to a concrete with improved construction performance and a preparation method thereof. Background technique [0002] In the process of concrete construction, on the one hand, it is hoped that the raw materials can have sufficient mixing construction time after mixing, on the other hand, it is hoped that after the construction is completed, the concrete can solidify faster, thereby reducing the waiting time. However, often the concrete ingredients with a long construction time have a long setting time, and the concrete ingredients with a short construction time have a short setting time. [0003] Water reducers are also called dispersants or plasticizers, and they get their name because they can reduce the water consumption of freshly mixed concrete when used. In the field of modern concrete technology, water reducing agent is one of the admixtures to improve t...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/24C04B24/42C08F283/06C08F220/06C04B103/30
Inventor 马清浩
Owner 福建科胜加固材料有限公司
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