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Early-strength corrosion-resistant C80 lightweight high-strength concrete and preparation method thereof

A high-strength concrete and corrosion-resistant technology, applied in the field of special concrete, can solve the problems of sulfate corrosion resistance, poor acid corrosion resistance, poor acid resistance, etc., to avoid delamination, improve strength shrinkage, improve crack resistance and concrete. The effect of toughness

Active Publication Date: 2020-07-28
中建西部建设新疆有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lightweight concrete is mostly used in exposed structures such as exterior walls and roofs, while conventional exterior coatings have poor acid resistance, and the concrete prepared with conventional Portland cement has poor sulfate and acid corrosion resistance; therefore, How to further formulate lightweight high-strength concrete with good corrosion resistance is particularly important

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of early-strength corrosion-resistant C80 lightweight high-strength concrete, its preparation method comprises the following steps:

[0037] 1) Weigh each raw material according to the ratio, each raw material and its dosage include: aluminate cement 490kg / m 3 , micro silica fume 250kg / m 3 , mineral powder 280kg / m 3 , glass beads 250kg / m 3 , sand 450kg / m 3 , Composite reinforced material 0.6kg / m 3 (The mass ratio of benzoic acid modified basalt fiber to calcium carbonate whisker is 80:20), admixture 20kg / m 3 , water 190kg / m 3 ;

[0038] 2) Mix the weighed aluminate cement, silica fume, mineral powder and glass microspheres to obtain a premixed cementitious material, dry mix the premixed cementitious material and sand, and then add water and additives Stir evenly, and finally add composite reinforcing materials to form fluid concrete with good workability, carry out moulding, leave the mold at 20°C for 24 hours, and then standardize for 28 days to obtain th...

Embodiment 2

[0041] A kind of ultra-early-strength corrosion-resistant C80 lightweight high-strength concrete, its preparation method comprises the following steps:

[0042] 1) Weigh each raw material according to the ratio, each raw material and its dosage include: aluminate cement 550kg / m 3 , micro silica fume 200kg / m 3 , mineral powder 285kg / m 3 , glass beads 180kg / m 3 , sand 450kg / m 3 , Composite reinforced material 0.8kg / m 3 (The mass ratio of benzoic acid modified basalt fiber to calcium carbonate whisker is 75:25), admixture 22kg / m 3 , water 200kg / m 3 ;

[0043] 2) Mix the weighed aluminate cement, silica fume, mineral powder and glass microspheres to obtain a premixed cementitious material, dry mix the premixed cementitious material and sand, then add water and admixtures to stir Uniform, finally add composite reinforcing materials to form fluid concrete with good workability, carry out moulding, let it stand at 20°C for 24 hours, then demould, and then standard curing for 2...

Embodiment 3

[0046] A kind of ultra-early-strength corrosion-resistant C80 lightweight high-strength concrete, its preparation method comprises the following steps:

[0047] 1) Weigh each raw material according to the ratio, each raw material and its dosage include: aluminate cement 600kg / m 3 , micro silica fume 200kg / m 3 , mineral powder 300kg / m 3 , glass beads 180kg / m 3 , sand 400kg / m 3 , Composite reinforced material 0.8kg / m 3 (The mass ratio of benzoic acid modified basalt fiber to calcium carbonate whisker is 70:30), admixture 22kg / m 3 , water 210kg / m 3 ;

[0048] 2) Mix the weighed aluminate cement, silica fume, mineral powder and glass microspheres to obtain a premixed cementitious material, dry mix the premixed cementitious material and sand, then add water and admixtures to stir Uniform, finally add composite reinforcing materials to form fluid concrete with good workability, carry out moulding, let it stand at 20°C for 24 hours, then demould, and then standard curing for 2...

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Abstract

The invention discloses early-strength corrosion-resistant C80 lightweight high-strength concrete and a preparation method thereof. The concrete comprises 450 to 600kg / m<3> of aluminate cement, 550 to900 kg / m<3> of composite mineral admixture, 250 to 450 kg / m<3> of sand, 0.6 to 1 kg / m<3> of a composite reinforcing material, 20 to 25 kg / m<3> of an additive and 180 to 220 kg / m<3> of water, whereinthe composite mineral admixture is prepared by compounding silica fume, mineral powder and glass beads. The early-strength corrosion-resistant C80 light-weight high-strength concrete can further showgood fluidity, corrosion resistance and durability on the basis of effectively considering light weight and high strength, and the related preparation method is simple, convenient to operate and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of special concrete, and in particular relates to an early-strength and corrosion-resistant C80 lightweight high-strength concrete and a preparation method thereof. Background technique [0002] Lightweight high-strength concrete is prepared by using artificial high-strength lightweight coarse aggregate (ie high-strength ceramsite) or natural lightweight high-strength aggregate instead of ordinary aggregate, and its dry apparent density is not more than 1950kg / m 3 , Lightweight concrete for structures with a strength grade above LC30. Compared with ordinary concrete, it has the advantages of light weight, good earthquake resistance, good fire resistance, good durability and heat insulation. At the same time, because a large amount of industrial solid waste such as fly ash and silica fume is used in the production of lightweight aggregate and the preparation of lightweight aggregate concrete, it has importan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/40C04B111/20
CPCC04B28/06C04B2201/20C04B2111/20C04B2111/40C04B2201/50C04B18/146C04B18/141C04B14/22C04B14/06C04B14/4643C04B14/383C04B22/002C04B2103/302
Inventor 艾洪祥李凯张平王军陈旭卢霄苏温馨
Owner 中建西部建设新疆有限公司