A concrete viscosity-adjusting and foam-stabilizing functional material and its preparation and use method
A functional material and concrete technology, which is applied in the field of concrete additives, can solve problems such as bubble bursting and loss of concrete air content, and achieve the effects of improving cohesion, improving bubble resistance, good elasticity and mechanical strength
Active Publication Date: 2021-04-02
HARBIN INST OF TECH
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Problems solved by technology
[0004] The present invention aims to solve the technical problems of the time-consuming loss of air content in concrete and the bursting of air bubbles caused by vibration in the existing winter construction process, and provides a concrete viscosity-adjusting and foam-stabilizing functional material and its preparation and use method
Method used
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specific Embodiment approach 1
[0014] Embodiment 1: The concrete viscosity-adjusting and foam-stabilizing functional material of this embodiment includes 2% to 4% of liquid film enhancer, 5% to 10% of slurry viscosity modifier, 10% to 15% of Flocculation accelerator and 71% to 83% slurry enhancer; wherein said liquid film enhancer is one or a combination of modified silicone resin polyether microemulsion, coconut oil fatty acid diethanolamide; said The preferred slurry enhancer is limestone powder.
specific Embodiment approach 2
[0015] Embodiment 2: This embodiment is different from Embodiment 1 in that the slurry viscosity-adjusting agent is one of xanthan gum, polyacrylamide and polyethylene oxide or a combination of several of them;
[0016] In this embodiment, when the slurry viscosity modifier is a composition, it can be combined in any ratio.
specific Embodiment approach 3
[0017] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the mass percent purity of the xanthan gum, polyacrylamide and polyethylene oxide are all ≥ 98%; the others are the same as Embodiment 2.
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Abstract
The invention provides a viscosity-adjusting bubble-stabilizing functional material for concrete as well as preparation and use methods of the material, and relates to the concrete additive. The invention aims to solve the technical problem that of bubble bursting caused by gradual loss of a gas content and vibration of concrete in current winter construction process. The viscosity-adjusting bubble-stabilizing functional material for the concrete comprises the following components: a liquid film reinforcing agent, a slurry viscosity-adjusting agent, a flocculation accelerant and a slurry reinforcing agent, wherein the liquid film reinforcing agent is one or a combination of two selected from a modified silicone resin polyether micro-emulsion and coconut oil fatty acid diethanolamide, and the slurry reinforcing agent is limestone powder. The preparation method comprises the following steps: preparing an aqueous solution from the liquid film reinforcing agent, adding the aqueous solutioninto a mixture of the slurry viscosity-adjusting agent, the flocculation accelerant and the slurry reinforcing agent, performing uniform mixing, and performing drying to obtain the functional material. When the functional material provided by the invention is used, the viscosity-adjusting bubble-stabilizing functional material for the concrete is added into concrete slurry containing an air entraining agent, and uniform mixing is performed. The concrete obtained after the functional material is added has segregation resistance improved by three times or more than that of concreted without addition of the functional material, and the functional material can be used in the field of construction.
Description
technical field [0001] The invention relates to a concrete additive and belongs to the field of concrete materials. Background technique [0002] After adding the air-entraining agent into the concrete, a large number of tiny air bubbles can be introduced into the concrete slurry, which can not only effectively improve the fluidity of the concrete slurry, but also improve the stability of the concrete slurry. After hardening, it can also form a large number of closed cells in the concrete. Micropores, thereby significantly improving the frost resistance, impermeability and resistance to salt crystallization damage of concrete. Therefore, in order to improve the long-term durability of concrete that is vulnerable to freeze-thaw cycle damage in severe cold or cold regions, adding appropriate air-entraining agents is the most effective and commonly used technical measure. [0003] During the construction of concrete in winter, hot water is often used to dissolve the admixture ...
Claims
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IPC IPC(8): C04B24/42C04B24/26C04B103/48C04B103/44
CPCC04B40/0039C04B2103/44C04B2103/48C04B24/42C04B24/38C04B22/08C04B22/10C04B24/124C04B24/2652
Inventor 高小建张俊逸李帛晁江守恒杨英姿
Owner HARBIN INST OF TECH