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Concrete containing ether ester type water reducing agent, and preparation method thereof

A technology of water reducing agent and concrete, which is applied in the field of concrete containing ether ester type water reducing agent and its preparation

Inactive Publication Date: 2015-12-23
洛阳天骄混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Choosing an appropriate water reducing agent is beneficial to improve the performance of concrete and reduce costs. None of them can guarantee that they can still provide high enough strength and good slump retention value performance in concrete with high mud content.

Method used

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  • Concrete containing ether ester type water reducing agent, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0025] 1. Prepare base material

[0026] Add 145 kg of isobutenyl polyethylene glycol and 6 kg of acrylic acid to 120 kg of deionized water, stir and mix evenly to prepare a mixture, the mixture is warmed up to 20°C, and then 800 grams of 27.5% hydrogen peroxide and ammonium persulfate are added to the mixture 80 grams, stirred and mixed to prepare the bottom material.

[0027] 2. Preparation of A drip feed

[0028] A drop feed was prepared by adding 0.4 kg of vitamin C and 0.48 kg of mercaptopropionic acid (chain transfer agent) to 40 kg of deionized water.

[0029] 3. Preparation of modified polyethylene glycol methacrylate

[0030] Add 800 grams of polyethylene glycol monomethyl ether (molecular weight is 1200) into anhydrous drying kettle, stir and mix evenly, add 0.53 grams of phenothiazine, 232 grams of methacrylic acid and 21.3 grams of p-toluenesulfonic acid, seal and heat up to 120 ℃, esterification for 6.5 hours, during the 6.5 hours of esterification, the first v...

preparation Embodiment 2

[0036] Other conditions are the same as in Example 1 of the preparation of water reducer, except that polyethylene glycol acrylate is prepared in step 3 instead of modified polyethylene glycol acrylate, wherein the preparation step of polyethylene glycol acrylate include:

[0037] Add 800 grams of polyethylene glycol monomethyl ether (molecular weight: 1200) into an anhydrous drying kettle, stir and mix evenly, add 0.45 grams of phenothiazine, 232 grams of methacrylic acid, seal and heat up to 100 ° C, esterify for 6.5 hours, During the 6.5-hour esterification process, vacuuming was performed for the first time at the 2nd hour, and then reacted for 1 hour and 45 minutes. The second time was vacuumed, and the reaction was continued for 1 hour. Add the vacuumized waste liquid to obtain polyethylene glycol methacrylate.

preparation Embodiment 3

[0039] Other conditions were the same as those in Example 1 of the preparation of the water reducer, except that in Step 3, 194 grams of acrylic acid was used instead of 232 grams of methacrylic acid to obtain modified polyethylene glycol acrylate accordingly.

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Abstract

The invention provides high mud content concrete containing an ether ester type water reducing agent, wherein the concrete contains, by weight, 350-500 parts of cement clinker, 80-130 parts of fly ash, 20-30 parts of an expander, 80-120 parts of gypsum, 50-100 parts of limestone, 1-2 parts of a pH value adjusting agent, 8-15 parts of an ether ester type water reducing agent, 300-500 parts of quartz sand, and 500-800 parts of stone. According to the present invention, the concrete has the high mud content, the high cost caused by quartz sand purification is reduced, and the strength and the slump retention performance are good.

Description

technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to concrete containing an ether-ester type water reducer and a preparation method thereof. Background technique [0002] Concrete is an important building material, which occupies a large proportion in the construction cost. At the same time, the strength and performance of concrete also directly determine the quality of the building. However, as the resource of sand, one of the main components of concrete, becomes more and more scarce , the industry is faced with the high cost of purifying low-quality sand sources, that is, sand sources with large mud content, or the dilemma of using sand sources with large mud content to reduce the strength of concrete. The shortage of high-quality sand sources It has become a bottleneck in the industry to improve concrete performance while reducing or maintaining existing costs. [0003] Water reducers are also called dispe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/26C04B103/30
Inventor 马清浩
Owner 洛阳天骄混凝土有限公司
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