Hydration heat regulating and controlling material as well as preparation method and application thereof
A heat of hydration and cementitious material technology, applied in the field of concrete admixtures, can solve the problems of severe retardation, strength reduction, limited ability to suppress heat of hydration, etc., and achieve the effect of simple and easy preparation method and improved inhibition ability
Active Publication Date: 2014-04-23
JIANGSU SOBUTE NEW MATERIALS
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- Description
- Claims
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AI Technical Summary
Problems solved by technology
[0008] In view of the various shortcomings of the heat of hydration suppression materials reported so far: the heat of hydration suppression ability is limited, and it is easy to cause problems such as strength reduction and serious retardation
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0035] Add 1,000g of dextrin with a number average molecular weight of 84,000g / mol and a size of 700um to 2,000g of water, add 0.12g of epichlorohydrin, adjust the pH to 10 with NaOH, raise the temperature to 45°C for 12 hours, and obtain a white powder after separation and drying. That is, the dextrin described in the present invention.
Embodiment 2
[0037] Except that the size of the dextrin used is 100um, others are consistent with Example 1.
Embodiment 3
[0039] Except that the size of the dextrin used is 10um, others are consistent with Example 1.
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The invention relates to the field of concrete admixtures and particularly relates to a hydration heat regulating and controlling material as well as a preparation method and an application thereof. According to the material with a hydration heat regulating and controlling function, a component is surface cross-linked dextrin prepared by a cross-linking reaction. The invention discloses the hydration heat regulating and controlling material which can greatly regulate and control the hydration speed of cement, reduce the temperature rise of concrete and does not influence the middle-period and post-period strength of the concrete.
Description
technical field [0001] The invention relates to the field of concrete admixtures, in particular to a hydration heat regulating material and a preparation method thereof. Background technique [0002] Cement hydration will release a lot of heat. When the heat released by cement hydration in concrete is too late to dissipate, the internal temperature of concrete will rise, and when the hydration stops later, the concrete temperature will drop to ambient temperature; this temperature The change will cause the volume of concrete to change, and under constrained conditions, it will lead to concrete cracking, which will affect the durability and safety of concrete components. [0003] In order to reduce the temperature change in concrete, it is necessary to regulate the hydration process of cement, and reduce the hydration speed of cement as much as possible during the acceleration period, so that the heat generated by cement hydration will not be released in a concentrated manner...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08B31/00C08J3/24C04B24/38
Inventor 刘加平王文彬李磊田倩王育江王洪松王瑞
Owner JIANGSU SOBUTE NEW MATERIALS
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