A kind of mortar concrete internal curing material and preparation method thereof

A mortar concrete and material technology, applied in the field of mortar concrete production soil, can solve volume shrinkage and other problems, achieve the effects of reducing water consumption, reducing porosity, and increasing concrete strength

Active Publication Date: 2021-11-16
四川鑫统领混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to: provide a kind of mortar concrete internal maintenance material and preparation method thereof, aim at the sensitivity problem of the early cracking of concrete of low water-to-binder ratio, solve the problem of introducing saturated light aggregate (LWA) or mixing water into concrete in the prior art After entering the super absorbent resin (SAP), there is a problem of volume shrinkage after water is released.

Method used

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  • A kind of mortar concrete internal curing material and preparation method thereof

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Embodiment 1

[0034] A kind of mortar concrete internal maintenance material, described mortar concrete internal maintenance material comprises 78% of circulating fluidized bed sulfur-fixing ash, 4% of hydroxypropyl methylcellulose ether, 1% of hydroxypropyl Base guar gum, 15% masking agent, 2% regulator.

[0035] The masking agent includes 83% polyvinyl alcohol, 15% chitosan, 1.5% sucrose and 0.5% stearic acid in mass percent.

[0036] The regulator includes 91% alginic acid, 2.5% gelatin, 5% beta-cyclodextrin and 1.5% sodium ethylenediaminetetraacetate in terms of mass percentage.

[0037] The degree of deacetylation of the chitosan is 92%.

[0038] The preparation method of the internal maintenance material of the mortar concrete comprises the following steps:

[0039] 1. Sorting: Take 1000g of circulating fluidized bed sulfur-fixing ash, the circulating fluidized bed sulfur-fixing ash meets the requirements of Table 1, pass the circulating fluidized bed sulfur-fixing ash through a 1.18m...

Embodiment 2

[0049] A kind of mortar concrete internal curing material, said mortar concrete internal curing material comprises 77% of circulating fluidized bed sulfur-fixing ash, 3% of hydroxypropyl methylcellulose ether, 0.5% of hydroxypropyl Base guar gum, 18% masking agent, 1.5% regulator.

[0050] The masking agent includes 81% polyvinyl alcohol, 16% chitosan, 2% sucrose and 1% stearic acid in terms of mass percentage.

[0051] The adjusting agent includes 90% alginic acid, 3% gelatin, 5% beta-cyclodextrin and 2% sodium ethylenediaminetetraacetate in terms of mass percentage.

[0052] The degree of deacetylation of the chitosan is 95%.

[0053] A method for preparing a mortar concrete internal maintenance material, comprising the following steps:

[0054] 1. Sorting: Take 1500g of circulating fluidized bed sulfur-fixing ash, the circulating fluidized bed sulfur-fixing ash meets the requirements of Table 1, pass the circulating fluidized bed sulfur-fixing ash through a 1.18mm square ...

Embodiment 3

[0062] Based on the application of a mortar concrete internal curing material: soak the mortar concrete internal curing material in 2 times the volume of water for 48 hours, and mix the mortar concrete internal curing material at a rate of 60kg / m 3 The addition of a certain amount will not produce the customary floating phenomenon like the light aggregates of the prior art, and will basically have no effect on the working performance of the concrete. At the same time, it can improve the cohesion and fluidity of the mortar, reduce the bleeding phenomenon, and increase the concrete slump by 20-30mm. The relative humidity RH inside the concrete was detected, and it was found that the relative humidity was greater than 95% on the 3d day, greater than 92% on the 7th day, and greater than 80% on the 28th day, which is a significant improvement over the prior art.

[0063] In terms of volume stability of concrete, after adding the mortar concrete internal curing material provided by ...

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Abstract

The invention discloses a mortar concrete internal maintenance material and a preparation method thereof, and relates to the technical field of mortar concrete. In the early stage of hydration, a masking agent is used to form a covering film to isolate water and circulating fluidized bed sulfur-fixing ash, which can act as a water reducing agent. It can reduce the water consumption of concrete, and in the later stage, it can be cross-linked with cement hydration products to improve the properties of the transition zone of the concrete interface. The internal curing material can participate in the hydration reaction in the later stage of hydration, and at the same time rely on its own expansion to reduce the porosity of the system and increase Concrete strength without compromising concrete durability.

Description

technical field [0001] The invention relates to the technical field of mortar concrete production soil, in particular to a mortar concrete internal maintenance material and a preparation method thereof. Background technique [0002] With the increase of domestic infrastructure construction, the number of large buildings and structures in special fields is gradually increasing. These large buildings have the characteristics of large volume, long span, high stress, green environmental protection, and high durability requirements, which require high Performance concrete is used as a basic building material, especially high-strength concrete and special mortar. According to the relationship between concrete mortar strength and porosity and the water-cement ratio rule, it can be known that high-strength concrete must require a lower water-binder ratio. Therefore, high-performance concrete with low water-to-binder ratio mixed with highly active mineral admixtures such as silica f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B24/383C04B24/38C04B24/2623C04B24/10C04B24/08C04B24/06C04B18/062
Inventor 封培然
Owner 四川鑫统领混凝土有限公司
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