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A kind of diatomite modified concrete and preparation method thereof

A diatomite and concrete technology, applied in the field of diatomite modified concrete and its preparation, can solve the problems of reducing the brittleness of high-strength concrete, reducing the strength of high-strength concrete, and large shrinkage of high-strength concrete, so as to improve the early cracking problem, reduce brittleness, reduce The effect of reducing the cracked area

Active Publication Date: 2019-11-05
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a diatomite modified concrete, which can solve the problem of large early shrinkage of high-strength concrete, can effectively reduce the brittleness of high-strength concrete, and will not reduce the strength of high-strength concrete

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  • A kind of diatomite modified concrete and preparation method thereof

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Embodiment 1

[0042] A preparation method of diatomite modified concrete, comprising the following steps:

[0043] 1), diatomite pretreatment: mix 1 weight part of diatomite and 1.5 weight parts of tap water, carry out water absorption treatment, stir evenly, make the material after mixing be in saturated surface dry state;

[0044] 2), 15 parts by weight of cement, 25 parts by weight of river sand and 40 parts by weight of crushed stone are poured into the mixer for dry mixing, the average particle size of the river sand is 0.5 mm, and the average particle size of the crushed stone is 15 mm;

[0045] 3) Dissolving 0.2 parts by weight of naphthalene-based high-efficiency water-reducer in water to form an aqueous water-reducer solution;

[0046] 4) Pour the aqueous solution of naphthalene-based high-efficiency water reducer into the mixer for wet mixing;

[0047] 5) Pour the saturated surface-dried diatomaceous earth into the mixer, continue stirring, and obtain concrete evenly;

[0048] 6...

Embodiment 2

[0052] A preparation method of diatomite modified concrete, comprising the following steps:

[0053] 1), diatomite pretreatment: mix 2 parts by weight of diatomite and 3.4 parts by weight of tap water, perform water absorption treatment, and stir evenly, so that the mixed material is in a saturated surface-dry state;

[0054] 2) Pour 20 parts by weight of cement, 30 parts by weight of river sand and 45 parts by weight of crushed stone into a mixer for dry mixing. The average particle size of the river sand is 0.7 mm, and the average particle size of the crushed stone is 25 mm;

[0055] 3) Dissolving 0.5 parts by weight of naphthalene-based high-efficiency water-reducer in water to form an aqueous water-reducer solution;

[0056] 4) Pour the aqueous solution of naphthalene-based high-efficiency water reducer into the mixer for wet mixing;

[0057] 5) Pour the saturated surface-dried diatomaceous earth into the mixer, continue stirring, and obtain concrete evenly;

[0058] 6) ...

Embodiment 3

[0062] A preparation method of diatomite modified concrete, comprising the following steps:

[0063] 1), diatomite pretreatment: mix 4 parts by weight of diatomite and 6.4 parts by weight of tap water, perform water absorption treatment, and stir evenly, so that the mixed material is in a saturated surface-dry state;

[0064] 2), 18 parts by weight of cement, 28 parts by weight of river sand and 42 parts by weight of crushed stone are poured into the mixer in proportion to dry mixing. The average particle diameter of the river sand is 0.6mm, and the average particle diameter of the crushed stone is 20mm;

[0065] 3) Dissolving 0.3 parts by weight of naphthalene-based high-efficiency water reducer in water to form an aqueous water reducer solution;

[0066] 4) Pour the aqueous solution of naphthalene-based high-efficiency water reducer into the mixer for wet mixing;

[0067] 5) Pour the saturated surface-dried diatomaceous earth into the mixer, continue stirring, and obtain c...

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Abstract

The invention discloses a diatomite modified concrete and a preparation method thereof. The diatomite modified concrete consists of the following components in parts by weight: 15-20 parts by weight of cement, 1-5 parts by weight of diatomite, 6-6 parts by weight of water 8 parts by weight, 25-30 parts by weight of river sand, 40-45 parts by weight of gravel, and 0.2-0.5 parts by weight of water reducing agent. In the present invention, by doping a certain proportion of diatoms in the concrete, the diatomite is pretreated in advance in the process of preparing the concrete, and the prepared concrete solves the problem of large early shrinkage of the high-strength concrete, and can effectively reduce the brittleness of the high-strength concrete , without reducing the strength of high-strength concrete.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, in particular to a diatomite modified concrete and a preparation method thereof. Background technique [0002] Many experts and scholars at home and abroad are committed to improving the early crack resistance of high-strength concrete from the perspective of concrete materials. At present, there are two commonly used technical approaches to improve the early shrinkage of high-strength concrete: one is to add superplasticizers to concrete; the other is to add mineral admixtures. However, only adding water reducer can not improve the composition and quality of cement hydration products, but adding mineral admixtures can improve the early shrinkage of concrete and the composition and quality of cement hydration products. Studies have shown that adding mineral admixtures or adding pre-absorbent internal curing materials can effectively prevent early cracking of concrete. The currently...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B20/10
CPCC04B20/1088C04B28/02C04B2111/346C04B2201/50C04B14/08C04B14/06C04B14/02C04B2103/302C04B20/0076
Inventor 石宵爽姜丰栾晨晨李碧雄
Owner SICHUAN UNIV
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