Thixotropic agent for cement-based system and preparation method thereof
A thixotropic agent and matrix technology, applied in the field of building materials, can solve the problems of high viscosity of concrete, general thixotropic performance, poor compatibility between thixotropic agent and water reducing agent, etc., to achieve improved homogeneity and good compatibility Effect
Active Publication Date: 2016-08-24
JIANGSU SOBUTE NEW MATERIALS
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Problems solved by technology
[0006] Purpose of the invention: The present invention aims at the poor compatibility between the existing thixotropic agent and the water reducer, which leads to its general thixotropic performance, the viscosity of the concrete is still relatively high during the mixing stage, and the fluidity of the concrete loses quickly, etc., and provides a Thixotropic agent for cement-based system and preparation method thereof
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[0031] Each thixotropic agent in this embodiment was prepared according to various substances and their ratios in the following table.
[0032] Its preparation method is to mix the fatty acid glyceride, fatty acid sodium salt, small molecular polyether and water in the above ratio, and stir thoroughly at 60°C to 80°C. variable agent.
[0033] Fatty acid glycerides, fatty acid sodium salts and small molecule polyethers described in each embodiment can be directly purchased from the market, and its code name and molecular formula are as shown in Table 1 and Table 2:
[0034] Table 1 Fatty acid glyceride code
[0035]
[0036] Table 2 Fatty acid sodium salt and small molecule polyether code
[0037]
[0038] The raw material formula of each embodiment and comparative example is as shown in table 3:
[0039] The concrete composition of table 3 embodiment 1-6 and comparative example 1-3
[0040]
[0041]
[0042] When the thixotropic agent of the present invention i...
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The invention provides a thixotropic agent for a cement-based system and a preparation method thereof. The thixotropic agent for the cement-based system is composed of the following raw materials in percent by weight: 10-20% of fatty acid glyceride, 5-15% of fatty acid sodium, 30-55% of a small-molecular polyether, and the balance water. The disclosed thixotropic agent is excellent in compatibility with a water reducer, is applicable to large-fluidity systems such as prestress grouting, self-leveling cement, self-compacting concrete, underwater anti-washout concrete and the like, guarantees that concrete is not separated and does not cause bleeding under the condition of large fluidity, and helps to substantially improve the homogeneity and workability of a cement-based cementitious system.
Description
technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a thixotropic agent for a cement-based system and a preparation method thereof. Background technique [0002] Thixotropic agent is a new type of cement concrete admixture researched and developed in recent years. The purpose of adding this admixture is to increase the cohesion and cohesive force of cement cementitious materials, reduce the separation rate of material components, and improve the uniformity. properties and properties of hardened products. [0003] The thixotropic agent can form a network structure in the cement-based gelling system. When the cement-based gelling system is subjected to shear force, the network structure formed by the thixotropic agent is destroyed, and the cement-based gelling system recovers fluidity, resulting in cement-based adhesive The viscosity of the cement-based gelling system decreases; when the shear force stops, th...
Claims
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IPC IPC(8): C04B24/04
Inventor 高南箫冉千平乔敏刘加平
Owner JIANGSU SOBUTE NEW MATERIALS