Super retarding concrete

A concrete and ultra-retarding technology, which is applied in the field of building materials, can solve the problems of super-concrete research difficulties, etc., and achieve the effects of facilitating hydration reaction, improving mechanical strength and durability, and improving rheological properties

Inactive Publication Date: 2020-08-04
深圳市鸿力健混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the point of view of material science, this contradiction brings certain difficulties to the research of super concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, an ultra-retarded concrete includes the following raw materials in parts by weight: 210 parts of cement, 30 parts of admixtures, 3 parts of basalt fiber, 8 parts of admixtures, 805 parts of river sand, 985 parts of stones, and water 165 parts, the additive is composed of water reducer, retarder, water retention agent and defoamer, and the weight ratio of water reducer, retarder, water retention agent and defoamer is 6:7:3: 1. The admixture is composed of phosphorus slag, fly ash and microbeads, and the weight ratio of the phosphorus slag, fly ash and hollow glass microbeads is 10:40:10.

[0026] Preferably, the cement is ordinary Portland cement, and the cement strength grade is 42.5.

[0027] Preferably, the basalt fiber has a density of 2.8-3.3 g / cm3, a fiber length of 3-6 mm, a fiber diameter of 15-16 μm, a tensile strength of 3500-4500 MPa, and a tensile modulus of 85-95 GPa.

[0028] Preferably, the river sand is natural river sand, the apparent densi...

Embodiment 2

[0036] In this embodiment, a super retarded concrete includes the following raw materials in parts by weight: 250 parts of cement, 50 parts of admixtures, 5 parts of basalt fiber, 10 parts of admixtures, 810 parts of river sand, 1010 parts of stones and water 170 parts, the additive is composed of water reducer, retarder, water retention agent and defoamer, the weight ratio of water reducer, retarder, water retention agent and defoamer is 8:9:5: 2. The admixture is composed of phosphorus slag, fly ash and microbeads, and the weight ratio of the phosphorus slag, fly ash and hollow glass microbeads is 20:50:15.

[0037] Preferably, the retarder is composed of citric acid and sodium gluconate, and the weight ratio of the citric acid and sodium gluconate is 3:5.

Embodiment 3

[0039] In this embodiment, an ultra-retarded concrete includes the following raw materials in parts by weight: 220 parts by weight of cement, 40 parts by admixture, 4 parts by basalt fiber, 9 parts by admixture, 808 parts by river sand, 990 parts by stone and water 168 parts, the additive is composed of a water reducer, a retarder, a water retaining agent and a defoaming agent, and the weight ratio of the water reducing agent, a retarder, a water retaining agent and a defoaming agent is 7:8:4: 1.5. The admixture is composed of phosphorus slag, fly ash and microbeads, and the weight ratio of the phosphorus slag, fly ash and hollow glass microbeads is 15:45:12.

[0040] Preferably, the retarder is composed of citric acid and sodium gluconate, and the weight ratio of the citric acid and sodium gluconate is 2:4.

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Abstract

The invention relates to the technical field of building materials, in particular to super-retarding concrete. The formula comprises the following raw materials in parts by weight: 210-250 parts of cement, 30-50 parts of an admixture, 3-5 parts of basalt fiber, 8-10 parts of an additive, 805-810 parts of river sand, 985-1010 parts of stone and 165-170 parts of water. The additive comprises a waterreducing agent, a retarder, a water retaining agent and a defoaming agent, the weight ratio of the water reducing agent to the retarder to the water retaining agent to the defoaming agent is (6-8): (7-9): (3-5): (1-2), the admixture comprises phosphorus slag, coal ash and microbeads, and the weight ratio of the phosphorus slag to the coal ash to the hollow glass microbeads is (10-20) :(40-50) :(10-15). The super-retarding concrete with higher strength and longer setting time is obtained by reasonably proportioning the cement, the admixture, the basalt fibers, the additive, the river sand, thestone and the water and matching the raw materials, pumping construction can be carried out, segregation and layering are not likely to happen, and the super-retarding concrete has important significance on development of the concrete industry.

Description

Technical field [0001] The invention relates to the technical field of building materials, in particular to a super retarded concrete. Background technique [0002] With the development of society and the needs of various large-scale projects, the scope of application of concrete continues to expand, and the performance requirements of concrete are getting higher and higher. In many large-scale projects, in order to meet the needs of construction procedures and construction time, it is required to extend the concrete The setting time must also ensure the mechanical strength of the setting, and there is no segregation or bleeding before and after the concrete is poured, which will affect the construction quality. [0003] On the one hand, ultra-retarded concrete requires a longer setting time in the early stage of the concrete, and on the other hand, it must have sufficient mechanical strength. From the point of view of materials science, this contradiction has brought certain diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/145C04B18/08C04B14/22C04B14/46C04B2103/302C04B2103/22C04B2103/465C04B2103/50C04B14/068C04B14/02
Inventor 钟富健
Owner 深圳市鸿力健混凝土有限公司
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