Ultra-high performance concrete containing silt artificial gravel and preparation method of ultra-high performance concrete

A technology of high-performance concrete and artificial sandstone, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems such as ineffective application, poor competitiveness, and poor concrete strength, and prevent moisture migration , reduce energy consumption, increase the effect of compressive strength

Active Publication Date: 2021-07-23
CCCC ROAD & BRIDGE SPECIAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In short, the strength of the concrete obtained by the existing technology is poor, and the process, cost, and raw material acquisition are all weaker than the ordinary C30 concrete of the competing products, and the competitiveness is poor, so it cannot be effectively applied in construction projects and highway projects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of artificial sandstone

[0039] (1) Pretreatment: After filtering the dredged sediment of rivers, lakes and seas through a 10cm sieve, add 15 parts of quicklime for every 100 parts of sludge (water content weight), stir and let it stand for 3 days, and grind it to less than 0.106mm after drying spare.

[0040] (2) Primary granulation: Take 100 parts of the above pretreated sludge, mix it with 10 parts of cement, 5 parts of desulfurized gypsum, and 3 parts of activated metakaolin to make A, put A in a disc granulator, and spray The method is to spray 15 parts of water while granulating, and the diameter of granulation is controlled between 7mm. After completion, the artificial sand is watered and cured for 7 days to obtain B.

[0041] (3) Interface treatment: After the curing is completed, use water-based high-permeability epoxy material to spray the surface of the artificial sand after curing for the first time, and the spraying amount is controlled at...

Embodiment 2

[0057] (1) Pretreatment: After filtering the dredged sediment of rivers, lakes and seas through a 10cm sieve, add 5 parts of quicklime for every 100 parts of sludge (water content weight), stir and let it stand for 5 days, and grind it to less than 0.106mm after drying spare.

[0058] (2) Primary granulation: Take 100 parts of the above pretreated sludge, mix it with 20 parts of cement, 2 parts of desulfurized gypsum, and 1 part of activated metakaolin to make A, put A in a disc granulator, and spray The method is to spray 20 parts of water while granulating, and control the granulation diameter below 7mm. After the completion, the artificial sand is watered and cured for 7 days to obtain B.

[0059] (3) Interface treatment: After the curing is completed, use water-based high-permeability epoxy material or other concrete protective materials to spray the surface of the artificial sand after curing for the first time, and the spraying amount is controlled at 0.1mm / m 2 , after ...

Embodiment 3

[0075] (1) Pretreatment: After filtering the dredged sediment of rivers, lakes and seas through a 10cm sieve, add 10 parts of quicklime for every 100 parts of sludge (water content weight), stir and let it stand for 4 days, and grind it to below 0.106mm after drying spare.

[0076] (2) Primary granulation: Take 100 parts of the pretreated sludge, mix it with 10 parts of cement, 2 parts of desulfurized gypsum, and 1 part of activated metakaolin to make A, put A in a disc granulator, and spray The method is to spray 5 parts of water while granulating, and the diameter of granulation is controlled between 0-1mm. After completion, the artificial sand is watered and cured for 7 days to obtain B.

[0077] (3) Interface treatment: After the curing is completed, use water-based high-permeability epoxy material or other concrete protective materials to spray the surface of the artificial sand after curing for the first time, and the spraying amount is controlled at 0.05mm / m 2 , after ...

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Abstract

The invention discloses high-performance concrete, which comprises sludge artificial sandstone, and the high-performance concrete containing the sludge artificial sandstone is prepared from the following components in parts by mass: 35-41 parts of artificial stone, 51-56 parts of artificial fine sand, 33-39 parts of artificial coarse sand, 97-103 parts of cement, 17-22 parts of silica fume, 0-38 parts of mineral powder, 0-38 parts of fly ash, 9-12 parts of dried sludge, 3.5-3.9 parts of water reducing agent, 21-24 parts of steel fiber and 24-26 parts of water. The obtained concrete is high in strength, the process, cost, raw material obtaining and the like are higher than those of common C30 concrete, and the concrete can be widely applied to the technical field of concrete material preparation.

Description

technical field [0001] The invention relates to the technical field of concrete material preparation. More specifically, the invention relates to an ultra-high performance concrete containing silt artificial sand and a preparation method thereof. Background technique [0002] Silt has a high water content and complex composition, which is prone to secondary pollution. Improper disposal will have extremely adverse effects on the environment. Therefore, the treatment and disposal of dredged river bottom sludge has become a common concern. The existing silt utilization technologies mainly include solidified soil, sintered ceramsite, non-fired ceramsite, silt brick, silt cement, etc., and the technical prospect of non-fired ceramsite is the most extensive. [0003] Chinese Patent Application Publication No. CN 110156409 A discloses a concrete containing silt and its preparation method, adding cement, silt, fly ash, basalt gravel, river sand, polypropylene fiber, and nano-reinfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B28/00C04B18/04C04B41/71
CPCC04B28/144C04B28/00C04B18/0418C04B41/52C04B41/71C04B2111/00017C04B7/00C04B14/106C04B18/146C04B18/141C04B41/5076C04B41/50C04B41/4853C04B41/4543Y02W30/91C04B14/068
Inventor 王伟乐绍林韩永平朱世峰路洋陈伟全小娟陈小伟
Owner CCCC ROAD & BRIDGE SPECIAL ENG
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