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Self-retarding concrete

A concrete, selected technology, applied in the field of concrete

Inactive Publication Date: 2018-09-21
芜湖恒固混凝土材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary concrete cannot meet this requirement

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0018] The present invention also provides a kind of preparation method of self-retarding concrete, comprises the following steps:

[0019] (1) Evenly ball-mill bentonite and kaolin and calcinate at 300-450°C for 2-4 hours to obtain a mixed powder, then mill the mixed powder, diethylenetriaminepentamethylenephosphonic acid and gypsum in a ball mill, and then add water, and then microwave reaction at 80-95°C for 5-10 hours to obtain modified mineral powder;

[0020] (2) After uniformly mixing unsaturated glycerol, fatty alcohol polyoxyethylene ether, polyol, acid anhydride and polyamine in water, react at 80-120°C for 2-4 hours to obtain a slow-setting intermediate;

[0021] (3) After uniformly dispersing the retarder intermediate, fly ash, cement, fine sand, clay ceramsite, aluminum silicate fiber, modified mineral powder, and additives in water, continue stirring for 60-150s to obtain the self- retarded concrete.

[0022] In the present invention, first, bentonite, kaolin a...

Embodiment 1

[0025] A self-retarding concrete, made of the following raw materials in parts by weight: 30kg fly ash, 25kg cement, 22kg fine sand, 15kg clay ceramsite, 8kg bentonite, 12kg kaolin, 12kg gypsum, 2kg diethylenetriaminepenta Forkedphosphonic acid, 10kg aluminum silicate fiber, 8kg glycidyl methacrylate, 3kg fatty alcohol polyoxyethylene ether (purchased from Haidongqing Chemical Co., Ltd., AEO-9), 3kg polybutylene terephthalate , 2kg N-(2-aminoethyl)-1,3-propylenediamine, 4kg phthalic anhydride, 0.5kg polycarboxylate superplasticizer (model PASP-Ca, purchased from Shandong Yuanlian Chemical Co., Ltd.) , 1kg sodium dodecylbenzenesulfonate, 0.5kg calcium stearate, 0.5kg hydroxyethyl methyl reinforced cellulose ether, 0.5kg sodium aluminate.

[0026] The preparation steps of described self-retarding concrete are as follows:

[0027] (1) After uniform ball milling of bentonite and kaolin, calcining at 350°C for 3 hours to obtain a mixed powder, then ball milling the mixed powder, d...

Embodiment 2

[0031]A self-retarding concrete, made of the following raw materials in parts by weight: 36kg fly ash, 30kg cement, 16kg fine sand, 18kg clay ceramsite, 6kg bentonite, 8kg kaolin, 6kg gypsum, 2kg diethylene triamine pentamethyl Forkedphosphonic acid, 12kg aluminum silicate fiber, 5kg 2-glycidyl methacrylate, 5kg fatty alcohol polyoxyethylene ether (purchased from Costin Chemical Co., Ltd., AEO-9), 2kg polyoxypropylene glycol, 3kg Diethylenetriamine, 6kg maleic acid, 1kg polycarboxylate water reducer (model PASP-Ca, purchased from Shandong Yuanlian Chemical Co., Ltd.), 1kg sodium dodecylbenzenesulfonate, 1kg stearic acid Calcium, 1kg hydroxyethyl methyl reinforced cellulose ether, 1kg sodium aluminate.

[0032] The preparation steps of described self-retarding concrete are as follows:

[0033] (1) After uniform ball milling of bentonite and kaolin, calcining at 450°C for 2 hours to obtain a mixed powder, then ball milling the mixed powder, diethylenetriaminepentamethylenephosp...

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PUM

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Abstract

The invention relates to the technical field of concrete, in particular to self-retarding concrete. The self-retarding concrete is prepared from the following raw materials in parts by weight: 20-40 parts by weight of fly ash, 15-35 parts by weight of cement, 5-30 parts by weight of fine sand, 10-20 parts by weight of clay ceramsite, 5-15 parts by weight of bentonite, 6-18 parts by weight of kaolin, 4-12 parts by weight of gypsum, 2-4 parts by weight of diethylenetriamine pentamethylphosphonic acid, 3-15 parts by weight of aluminum silicate fiber, 3-12 parts by weight of unsaturated glyceryl alcohol, 1-5 parts by weight of fatty alcohol-polyoxyethylene ether, 1-5 parts by weight of polyhydric alcohol, 2-3 parts by weight of polyamine, 2-6 parts by weight of acid anhydride, and 0-5 parts byweight of an auxiliary agent. The self-retarding concrete has a setting time of 60 to 85 hours, has broad application prospects, and is low in cost and high in economic benefit.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to self-retarding concrete. Background technique [0002] Concrete has the characteristics of rich raw materials, low price and simple production process, so its consumption is increasing. At the same time, concrete also has the characteristics of high compressive strength, good durability, and a wide range of strength grades. These characteristics make it widely used, not only in various civil engineering, but also in shipbuilding, machinery industry, marine development, geothermal engineering, etc. Concrete is also an important material. [0003] With the continuous development of construction technology, concrete with various special requirements emerges as the times require. At the same time, the improvement of the level of construction equipment and the continuous emergence and promotion of new construction techniques have made concrete technology adapt to different design, ...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B18/02
CPCC04B28/02C04B18/027C04B2201/50C04B18/08C04B14/06C04B14/104C04B14/106C04B22/143C04B24/121C04B14/4656C04B24/045C04B24/32C04B24/283C04B24/04C04B2103/302C04B24/20C04B24/085C04B24/383C04B22/0093C04B18/023C04B14/10
Inventor 承忠富
Owner 芜湖恒固混凝土材料有限公司
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