Jet concrete prepared from super absorbent resin and expanded vermiculite

A super absorbent resin and sprayed concrete technology, applied in the field of building materials, can solve the problems of difficult post-curing and post-curing of shotcrete, and achieve the effects of green environmental protection and pollution-free construction, shortening the setting time, and reducing the rebound rate.

Inactive Publication Date: 2018-08-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Shotcrete is widely used in tunnel engineering, underground engineering and mine engineering, etc. However, because the moisture in the outer layer of shotcrete is difficult to enter the interior, it is difficult to carry out later maintenance, especially in some hidden projects and projects with dangers such as collapse and landslides. In the middle, the post-curing of shotcrete is more difficult to carry out

Method used

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  • Jet concrete prepared from super absorbent resin and expanded vermiculite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1, a sprayed concrete prepared by utilizing superabsorbent resin and expanded vermiculite, each component is cement 100, sand 100, stone 140, rock fiber 5, water 30, quick-setting agent 2, superabsorbent resin 0.4, expansion The mass ratio of vermiculite 20 was prepared, and the performance test results are shown in Table 1.

Embodiment 2

[0038] Example 2, a sprayed concrete prepared by utilizing superabsorbent resin and expanded vermiculite, each component is cement 100, sand 160, stone 200, rock fiber 14, water 60, quick-setting agent 12, superabsorbent resin 0.7, expansion The mass ratio of vermiculite 2 was prepared, and the performance test results are shown in Table 1.

Embodiment 3

[0039] Example 3, a sprayed concrete prepared by utilizing superabsorbent resin and expanded vermiculite, each component is cement 100, sand 120, stone 180, rock fiber 10, water 45, quick-setting agent 6, superabsorbent resin 0.1, expansion The mass ratio of vermiculite 10 was prepared, and the performance test results are shown in Table 1.

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PUM

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Abstract

The invention discloses jet concrete prepared from super absorbent resin and expanded vermiculite. The jet concrete is prepared from the following ingredients including cement, sand, stone, rock fiber, water, setting accelerating agents, super absorbent resin and expanded vermiculite. The super absorbent resin accounting for 0.3 to 0.5 percent of the mass of the cement and expanded vermiculite accounting for 1 to 5 percent of mass of aggregates are uniformly mixed into the jet concrete; an inner caring effect is achieved on the later period of the jet concrete; the condensation time of the jetconcrete can be obviously shortened; the pressure-resistant intensity and the anti-shrinkage performance can be improved; the rebounding rate is reduced; the green environment-friendly pollution-freeconstruction is realized; the jet concrete is particularly suitable for being used for construction such as culverts, bridges and underground engineering.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a shotcrete prepared by using superabsorbent resin and expanded vermiculite. Background technique [0002] The application of superabsorbent resin as internal curing material in concrete has received more and more attention. Super absorbent resin has a very high ability to absorb water, and the weight of water absorption can exceed 500 times its own weight. When the superabsorbent resin is mixed with concrete, the superabsorbent resin absorbs part of the stirring water. As the cement hydration progresses, the relative humidity inside the concrete decreases, and the superabsorbent resin begins to release water, which promotes cement hydration and increases the hydration products. It not only improves the strength of concrete, but also helps to improve the shrinkage resistance of concrete. [0003] Expanded vermiculite is a lightweight aggregate, and its internal poros...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B14/06C04B14/46C04B2103/12C04B24/24C04B14/185
Inventor 孙振平陈超冀言亮刘毅杨旭孙远送胡匡艺吴乐林
Owner TONGJI UNIV
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