Adsorbents for mud in concrete aggregates
An adsorbent and concrete technology, applied in the field of concrete, can solve the problems of reducing concrete performance, improving concrete production and use cost, and achieving the effects of reducing adsorption, reducing adsorption effect, and reducing adsorption effect.
Active Publication Date: 2017-08-01
CHONGQING XINCAI CONCRETE GRP
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- Description
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- Application Information
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Problems solved by technology
This method not only increases the cost of concrete production and use, but also seriously reduces the performance of concrete.
Method used
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Experimental program
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Embodiment 1
[0016] Get each component by the following weight percentages,
[0017] Prenol polyoxyethylene ether: 15%; polyethylene glycol (molecular weight: 2000): 10%; sodium hexametaphosphate: 2%; sodium silicate 3%; water: 70%. The above-mentioned components are mixed and dissolved to form an aqueous solution with a concentration of 30% wt to obtain the adsorbent.
Embodiment 2
[0019] Get each component by the following weight percentages,
[0020] Isobutenol polyoxyethylene ether: 20%; polyethylene glycol (molecular weight: 4000): 5%; sodium polyphosphate: 3%; potassium silicate 2%; water: 70%. The above-mentioned components are mixed and dissolved to form an aqueous solution with a concentration of 30% wt to obtain the adsorbent.
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Abstract
The invention relates to an adsorbent for mud in a concrete aggregate. The adsorbent is prepared by uniform mixing of the following components by weight: 15-20% of unsaturated polyether, 5-10% of polyethylene glycol, 2-3% of phosphate, 2-3% of water glass, and the balance water. The adsorbent provided by the invention can be adsorbed on mud in the concrete aggregate prior to a polycarboxylate superplasticizer, can avoid losing water reduction, slump retention and other efficacy due to adsorption of the polycarboxylate superplasticizer by soil, reduces the concrete slump time losing, ensures the mechanical performance, durability and other requirements of concrete, and is conducive to smooth construction.
Description
technical field [0001] The invention relates to the field of concrete, in particular to an adsorbent for mud in concrete aggregates. Background technique [0002] Concrete, referred to as "concrete" for short, refers to the collective name of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate, mixed with water (may contain admixtures and admixtures) in a certain proportion, and stirred. Polycarboxylate superplasticizer has been developed rapidly in recent years because of its environmental protection and excellent performance. It has become the mainstream water reducer for concrete and is widely used. However, due to the increasing shortage of natural sand and gravel resources in our country, many places have begun to use machine-made sand to produce concrete. Due to the high ...
Claims
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IPC IPC(8): C04B24/32
Inventor 董强王维勇田少宁刘绍利张瑜
Owner CHONGQING XINCAI CONCRETE GRP