Polycarboxylate medium-efficiency pumping agent for ready-mixed commodity pumping concrete

A technology for pumping concrete and polycarboxylates, which is applied in the field of building materials and can solve problems such as the inability to guarantee the slurry-to-bone ratio, the fact that concrete is easy to scratch the bottom, and cannot be applied.
CN103641358BActive Publication Date: 2015-10-07SHANGHAI CONSTR BUILDING MATERIALS TECH GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI CONSTR BUILDING MATERIALS TECH GRP CO LTD
Publication Date
2015-10-07

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Abstract

The invention relates to a polycarboxylate-type intermediate-efficiency pumping aid used for premix commodity pump concrete and applications of the pumping aid, and belongs to the field of building materials. The pumping aid is suitable for premix commodity pump concrete with intermediate-low strength levels. The pumping aid comprises following raw materials by weight: 4-20% of a slump-retaining water-reducing-type polycarboxylate-type high-efficiency water reducing agent having a solid content of 40%; 4-20% of a low-cost highly-water-reducing polycarboxylate-type high-efficiency water reducing agent having a solid content of 36%; 5-7% of magnesium lignosulphonate having a solid content of 50%, 1-5% of sodium gluconate, 0.02-0.1% of an air entraining agent and 0-3% of a high-performance viscosity modifier, with the balance being tap water. The concrete water reducing rate of the polycarboxylate-type intermediate-efficiency pumping aid having a solid content of about 13% is over 15%. The pumping aid can significantly improve the workability of newly stirred concrete and durability of hardened concrete. Products of the pumping aid are good in cement adaptability, stable in quality, low in cost, environmental-friendly, and prone to industrial production.
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Description

technical field

[0001] The invention relates to a polycarboxylate medium-efficiency pumping agent for concrete, belonging to the technical field of building materials, in particular to a polycarboxylate medium-efficiency pumping agent for ready-mixed commodity pumping concrete. Background technique

[0002] Polycarboxylate high-efficiency water reducer is the third generation of high-efficiency water reducer developed after the first generation of ordinary water reducer represented by wood calcium and the second generation of high-efficiency water reducer mainly represented by naphthalene and aliphatic. It is a new high-efficiency superplasticizer with the highest scientific and technological content, the best application prospect and the best comprehensive performance in the world today. The product has a series of advantages such as high water reduction, high slump retention, high reinforcement, low shrinkage, low chlorine, low alkali content, safety and non-toxicity, etc....

Claims

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