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Preparation method of cracking-resistant and waterproof concrete admixture

A waterproof concrete and admixture technology, applied in the field of building materials, can solve problems such as reducing the service life of concrete structures, achieve the effects of reducing subsidence, improving chloride ion penetration resistance, and reducing hygroscopicity

Inactive Publication Date: 2019-04-30
邱海亮 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the harsh ocean and deicing salt environment, the penetration of Cl- in uncompacted concrete causes the corrosion of steel bars, which greatly reduces the service life of concrete structures.

Method used

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  • Preparation method of cracking-resistant and waterproof concrete admixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An anti-cracking and waterproof concrete admixture, which includes the following parts by weight of raw materials:

[0042] 40 copies of marble powder;

[0043] 10 parts of granite powder;

[0044] 0.6 parts of composite activator;

[0045] 4 parts of early strength agent;

[0046] 1 part of water reducing agent;

[0047] 6 parts of additives;

[0048] Retarder 1 part;

[0049] 3 parts of flame retardant mixture;

[0050] 12 parts of modified nano calcium carbonate.

[0051] The composite activator is prepared by mixing calcium aluminate, sodium sulfate, ferrous sulfate and sodium naphthalenesulfonate formaldehyde condensate, adding catalyst triisopropanolamine and calcium sulfate, and then grinding it in a ball mill or mortar; The parts by weight of each component are: 25-30 parts of calcium aluminate, 17-20 parts of sodium sulfate, 10-15 parts of ferrous sulfate, 0.5-1 parts of sodium naphthalenesulfonate formaldehyde condensate, 1.8 parts of triisopropanolamine -2.0 parts, 2-4 pa...

Embodiment 2

[0065] An anti-cracking and waterproof concrete admixture, which includes the following parts by weight of raw materials:

[0066] 45 shares of marble powder;

[0067] 15 parts of granite powder;

[0068] 0.7 parts of compound activator;

[0069] 5 parts of early strength agent;

[0070] 2 parts of water reducing agent;

[0071] 7 parts of additives;

[0072] 2 parts of retarder;

[0073] 4 parts of flame retardant mixture;

[0074] 13 parts of modified nano calcium carbonate.

[0075] The composite activator is prepared by mixing calcium aluminate, sodium sulfate, ferrous sulfate and sodium naphthalenesulfonate formaldehyde condensate, adding catalyst triisopropanolamine and calcium sulfate, and then grinding it in a ball mill or mortar; The parts by weight of each component are: 25-30 parts of calcium aluminate, 17-20 parts of sodium sulfate, 10-15 parts of ferrous sulfate, 0.5-1 parts of sodium naphthalenesulfonate formaldehyde condensate, 1.8 parts of triisopropanolamine -2.0 parts, 2-...

Embodiment 3

[0089] An anti-cracking and waterproof concrete admixture, which includes the following parts by weight of raw materials:

[0090] 50 copies of marble powder;

[0091] 20 parts of granite powder;

[0092] 0.8 parts of composite activator;

[0093] 6 parts of early strength agent;

[0094] 3 parts of water reducing agent;

[0095] 8 parts of additives;

[0096] 3 parts of retarder;

[0097] 5 parts of flame retardant mixture;

[0098] 14 parts of modified nano calcium carbonate.

[0099] The composite activator is prepared by mixing calcium aluminate, sodium sulfate, ferrous sulfate and sodium naphthalenesulfonate formaldehyde condensate, adding catalyst triisopropanolamine and calcium sulfate, and then grinding it in a ball mill or mortar; The parts by weight of each component are: 25-30 parts of calcium aluminate, 17-20 parts of sodium sulfate, 10-15 parts of ferrous sulfate, 0.5-1 parts of sodium naphthalenesulfonate formaldehyde condensate, 1.8 parts of triisopropanolamine -2.0 parts, 2...

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Abstract

The invention discloses a cracking-resistant and waterproof concrete admixture. The cracking-resistant and waterproof concrete admixture comprises, by weight, 40-50 parts of marble powder, 10-20 partsof granite powder, 0.6-0.8 part of a composite activator, 4-6 parts of an early strength agent, 1-3 parts of a water reducing agent, 6-8 parts of an assistant, 1-3 parts of a set retarder, 3-5 partsof a flame retardant mixture and 12-14 parts of modified nanometer calcium carbonate. The cracking-resistant and waterproof concrete admixture has the advantages of low alkalinity, good acid and alkali resistance, early strength, fastness in hardening, continuous increase of the later strength, facilitation of the improvement of the safety and the durability of reinforced concrete, and suitableness for constructing ports, seawalls, coastal protection, cross-sea bridges, refueling-at-sea stations and other offshore engineering .

Description

Technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing an anti-cracking and waterproof concrete admixture. Background technique [0002] The impact of concrete cracks, corrosion and steel corrosion on the durability and safety of structures has become a major disaster worldwide. A large number of studies and practices around the world have shown that among the many factors affecting the durability of concrete, freeze-thaw cycles, sulfates Erosion, alkali material reaction, chloride ion penetration, carbonization and steel corrosion are considered to be the main factors leading to the deterioration and destruction of cement concrete, and they are also relatively active research fields in international cement concrete materials science in recent years. China’s geography and geology are quite complex. Except for offshore concrete projects in coastal areas, the erosion and destruction of concrete by acid, alk...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/24
CPCC04B40/0042C04B14/285C04B14/048C04B22/0093C04B22/147C04B22/149C04B24/226C04B24/122C04B22/143C04B24/24C04B22/064C04B22/04C04B22/02C04B24/121C04B24/001C04B22/14C04B24/06C04B24/003C04B14/28
Inventor 邱海亮任丹丹杨林骏韦盛刘兴钦
Owner 邱海亮
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