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Anti-freezing gelled sand gravel composite material

A technology of cemented sand and gravel and composite materials, which is applied in the field of frost-resistant cemented sand and gravel composite materials, which can solve problems such as unsatisfactory anti-freeze effects, achieve excellent frost resistance and compressive strength, and improve compressive strength and frost resistance durability, and the effect of accelerating cement hydration

Pending Publication Date: 2021-07-27
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects and problems of unsatisfactory antifreeze effect in the current gelled sand and gravel materials, the present invention provides a frost-resistant gelled sand and gravel material capable of improving frost resistance and its preparation process

Method used

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  • Anti-freezing gelled sand gravel composite material
  • Anti-freezing gelled sand gravel composite material
  • Anti-freezing gelled sand gravel composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: This embodiment provides a kind of frost-resistant gelled sand and gravel composite material, which is composed of the following raw materials in parts by weight, 80 parts of cement, 20 parts of fly ash, 100 parts of water, 600 parts of sand, 20 parts 860 parts of -40mm pebbles, 580 parts of 5-20mm small pebbles and admixtures, the apparent density of sand and gravel is 2350kg / m³, the sand rate is 29.4%, and the amount of admixtures accounts for 1.044% of the total raw materials, of which lauryl sulfuric acid Sodium 0.004%, triterpene saponin dosage 0.08%, graphene oxide dosage 0.06%, nano silicon powder dosage 0.50%, polycarboxylate superplasticizer dosage 0.40%.

[0021] Preparation:

[0022] (1) Add pebbles and river sand into the mixer according to the material ratio, dry mix for 15 seconds, then add cement and fly ash into the mixer, and continue dry mixing for 30 seconds

[0023] (2) Mix the admixture with water to obtain a mixed solution, shake and...

Embodiment 2

[0025] Embodiment 2: This embodiment provides a kind of frost-resistant gelled sand and gravel composite material, which is composed of the following raw materials in parts by weight, 60 parts of cement, 10 parts of fly ash, 110 parts of water, 650 parts of sand, 20 parts 850 parts of -40mm pebbles, 550 parts of 5-20mm small pebbles and admixtures, the apparent density of sand and gravel is 2350kg / m³, the sand rate is 31.7%, and the amount of admixtures accounts for 1.464% of the total raw materials, of which lauryl sulfuric acid Sodium 0.004%, triterpene saponin dosage is 0.12%, graphene oxide dosage is 0.04%, nano silicon powder dosage is 0.5%, polycarboxylate superplasticizer dosage is 0.80%.

Embodiment 3

[0026] Embodiment 3: This embodiment provides a kind of frost-resistant gelled sand and gravel composite material, which is composed of the following raw materials in parts by weight: 60 parts of cement, 10 parts of fly ash, 120 parts of water, 630 parts of sand, 20 parts 880 parts of -40mm pebbles, 600 parts of 5-20mm small pebbles and additives, the apparent density of sand and gravel is 2350kg / m³, the sand rate is 29.9%, and the amount of additives accounts for 2.268% of the total raw materials, of which lauryl sulfuric acid Sodium 0.008%, triterpene saponin dosage is 0.04%, graphene oxide dosage is 0.02%, nano silicon powder dosage is 1.0%, polycarboxylate superplasticizer dosage is 1.2%.

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to an anti-freezing gelled sand gravel composite material. The composite material is prepared from, by weight, 60 to 100 parts of cement, 10 to 30 parts of fly ash, 100 to 120 parts of water, 600 to 650 parts of sand, 850 to 900 parts of pebbles of 20 to 40mm, 550 to 600 parts of pebbles of 5 to 20mm and an additive, wherein the additive accounts for 1 to 3.4 percent of the total amount of the raw materials. The composite material prepared by adopting the formula disclosed by the invention not only can be used for on-site construction, but also has excellent pressure resistance and anti-freezing durability.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a frost-resistant gelled sand and gravel composite material. Background technique [0002] At present, the largest proportion of the existing dams in my country are earth-rock dams and concrete dams, which are commonly used internationally. Among them, earth-rock dams are relatively economical but have the risk of flooding and collapse, while concrete dams are relatively safe but costly. Basic requirements are also high. With the development of water conservancy projects, cemented dams, as a type of dam between earth-rock dams and concrete dams, have a short construction period, low overall cost, high reliability, strong overload capacity, and focus on local materials. The environmental requirements are small, and it can be completed by simple mixing, paving, vibrating rolling or pouring and vibrating. The current conventional cemented dam is to use cement...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B111/76
CPCC04B28/00C04B2111/76C04B2201/50C04B18/08C04B14/06C04B14/02C04B24/16C04B24/10C04B22/02C04B2103/302
Inventor 郭利霞郭磊钟凌王明华帅伟周亚楠武铮柴启辉
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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