Expanding material with low reaction rate and production method of expanding material with low reaction rate
A technology of expansion material and admixture, applied in the field of expansion material and its preparation, can solve the problems such as insufficient expansion performance, and achieve the effects of improving hydration, slowing down the acceleration effect, and reducing the usage amount
Active Publication Date: 2019-12-31
JIANGSU SOBUTE NEW MATERIALS +2
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Problems solved by technology
[0011] Aiming at the problem that the existing packaged expansion agent expands too fast when the concrete temperature rises and falls relatively rapidly, the expansion performance cannot be fully exerted. Applications of Slow Reaction Rate Expandable Materials
Method used
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Effect test
Embodiment 1
[0041] 100 parts of boric acid, 400 parts of pregelatinized starch, and 1100 parts of water are added to form a homogeneous solution, which is spray-dried to obtain a regulated admixture with a slow and controlled release function.
Embodiment 2
[0043] 100 parts of dextrin, 150 parts of pregelatinized starch, and 700 parts of water are added to form a homogeneous solution, which is spray-dried to obtain a regulated admixture with a slow and controlled release function.
Embodiment 3
[0045]100 parts of borax, 400 parts of pregelatinized starch, and 580 parts of water are added to form a homogeneous solution, which is spray-dried to obtain a regulating admixture with a slow and controlled release function.
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The invention belongs to the field of building materials, and particularly relates to an expanding material with a low reaction rate and a production method of the expanding material with the low reaction rate. A traditional sulfoaluminate expanding agent and a regulating additive are bonded together. Through a bonding effect of a bonding agent, distribution of the regulating additive in the expanding agent and a cement matrix is improved, a concentration of the regulating additive around particles of the expanding agent is increased, and only part of the regulating additive diffuses into thecement matrix, so that the regulating additive more affects hydration of the expanding agent rather than hydration of cement.
Description
technical field [0001] The invention belongs to the field of building materials, and relates to an expansion material with a slow reaction rate and a preparation method thereof. Background technique [0002] Concrete cracks are the most common engineering defects in civil, water conservancy, bridge and other projects, and more than 80% of the cracks are deformation cracks, such as self-shrinkage, dry shrinkage, and temperature shrinkage. [0003] At present, there are various admixtures for reducing concrete shrinkage. For example, Chinese patent CN 200710053035.1 discloses reducing shrinkage through water-absorbing resin internal maintenance. Chinese patent CN201410010473.X discloses a material that regulates cement hydration, thereby controlling temperature rise and reducing temperature shrinkage. [0004] In addition, using the volume expansion produced by the expansive component during the hydration process to compensate for the shrinkage of the cement-based material is...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C04B24/38
CPCC04B40/0039C04B40/0046C04B22/0013C04B24/38C04B22/002C04B24/383C04B24/02C04B22/142Y02W30/91
Inventor 王文彬王育江刘加平姚婷张守治王倩张敏
Owner JIANGSU SOBUTE NEW MATERIALS