CN104876511A - Anti-crack concrete - Google Patents

Abstract

The invention discloses anti-crack concrete which comprises the following raw materials in parts by weight: 300-400 parts of ordinary Portland cement, 700-800 parts of crushed stone, 500-600 parts of river sand, 200-300 parts of mica powder, 3-5 parts of a novel water reducing agent, 30-40 parts of rice hull powder, 100-200 parts of furnace dust, 3-4 parts of calcium stearate, 6-10 parts of nano silica, 3-4 parts of aluminum dihydrogen phosphate, 6-10 parts of polypropylene powder, 2-3 parts of metaboric acid, 20-30 parts of calcined conch shell powder and 160-200 parts of water. According to the anti-crack concrete, since the novel water reducing agent is added, the flowability of the concrete is improved, a water reducing effect is enhanced, and freeze-thaw resistance of the concrete is improved; since the polypropylene powder, the furnace dust and an aluminum adhesive solution are mixed, dispersity of the polypropylene powder and the furnace dust in slurry is improved, and toughness, impact resistance, durability and crack resistance of the concrete are improved.

Description

A kind of anti-crack concrete

Technical field

The present invention relates generally to concrete field, particularly relates to a kind of anti-crack concrete.

Background technology

Normal concrete is configured by suitable proportion by gelling material, thick, thin aggregate and water, the more artificial stone material through hardening.Have easy-formation, energy consumption is low, good endurance low price and be combined the advantage that can be made into various support mechanism with steel, is that the development of contemporary most widely used material of construction to human society plays a very important role.Also there is toughness difference in current concrete, fragility is large, dry shrinkage is large, easily the deficiencies such as cracking occurs.

Summary of the invention

The object of the invention is just to provide a kind of anti-crack concrete.

The present invention is achieved by the following technical solutions:

A kind of anti-crack concrete, is characterized in that what it was made up of the raw material of following weight parts:

Ordinary Portland cement 300-400, rubble 700-800, river sand 500-600, mica powder 200-300, novel water reducer 3-5, powdered rice hulls 30-40, stove dirt 100-200, calcium stearate 3-4, nano silicon 6-10, aluminium dihydrogen phosphate 3-4, polypropylene powder 6-10, metaboric acid 2-3, calcining Concha rapanae thomasianae powder 20-30, water 160-200;

Described novel water reducer is made up of the raw material of following weight parts:

Polycarboxylate water-reducer 20-30, Sodium Silicofluoride 3-4, ethylene glycol 0.8-1, ammoniacal liquor 1-2, silane coupling agent KH560 0.1-0.2;

Ethylene glycol is mixed with ammoniacal liquor, obtains alcohol ammonia solution after stirring, add Sodium Silicofluoride, insulated and stirred 10-20 minute at 30-35 DEG C, adds silane coupling agent KH560,100-120 rev/min of dispersed with stirring 4-6 minute, add polycarboxylate water-reducer, stir, to obtain final product.

A preparation method for anti-crack concrete, is characterized in that comprising the following steps:

(1) joined by metaboric acid in 10-20 times of water, add calcium stearate, nano silicon, be uniformly mixed 20-30 minute, add aluminium dihydrogen phosphate after stirring, raised temperature is 40-45 DEG C, 100-160 rev/min of dispersed with stirring 6-10 minute, obtains aluminium glue liquid;

(2) stove dirt being sent into concentration is soak 1-2 hour in the sodium hydroxide solution of 4-6%, takes out rear and polypropylene powder mixing and stirring, adds above-mentioned aluminium glue liquid, stir, and adds each raw material of residue, stirs, obtain described anti-crack concrete.

Advantage of the present invention is:

The novel water reducer that the present invention adds can improve concrete mobility, strengthen water-reducing effect, improve agent on crack resistance of concrete freeze thawing performance, by polypropylene powder, stove dirt are mixed with aluminium glue liquid, its dispersiveness in the slurry can be improved, improve toughness of concrete, shock resistance, improve weather resistance and splitting resistance.

Embodiment

Embodiment 1

A kind of anti-crack concrete, is characterized in that what it was made up of the raw material of following weight parts:

Ordinary Portland cement 400, rubble 800, river sand 600, mica powder 300, novel water reducer 5, powdered rice hulls 40, stove dirt 200, calcium stearate 4, nano silicon 10, aluminium dihydrogen phosphate 4, polypropylene powder 10, metaboric acid 2, calcining Concha rapanae thomasianae powder 30, water 200;

Described novel water reducer is made up of the raw material of following weight parts:

Polycarboxylate water-reducer 30, Sodium Silicofluoride 3, ethylene glycol 0.8, ammoniacal liquor 1, silane coupling agent KH560 0.2;

Mixed with ammoniacal liquor by ethylene glycol, obtain alcohol ammonia solution, add Sodium Silicofluoride after stirring, at 35 DEG C, insulated and stirred 20 minutes, adds silane coupling agent KH560, and 120 revs/min of dispersed with stirring 4 minutes, add polycarboxylate water-reducer, stir, to obtain final product.

A preparation method for anti-crack concrete, is characterized in that comprising the following steps:

(1) joined by metaboric acid in 20 times of water, add calcium stearate, nano silicon after stirring, be uniformly mixed 20 minutes, add aluminium dihydrogen phosphate, raised temperature is 45 DEG C, and 160 revs/min of dispersed with stirring 10 minutes, obtain aluminium glue liquid;

(2) stove dirt being sent into concentration is soak 2 hours in the sodium hydroxide solution of 6%, takes out rear and polypropylene powder mixing and stirring, adds above-mentioned aluminium glue liquid, stir, add each raw material of residue, stir, obtain described anti-crack concrete.

Performance test:

Folding strength: 7.9MPa.

Claims (2)

1. an anti-crack concrete, is characterized in that what it was made up of the raw material of following weight parts:

Ordinary Portland cement 300-400, rubble 700-800, river sand 500-600, mica powder 200-300, novel water reducer 3-5, powdered rice hulls 30-40, stove dirt 100-200, calcium stearate 3-4, nano silicon 6-10, aluminium dihydrogen phosphate 3-4, polypropylene powder 6-10, metaboric acid 2-3, calcining Concha rapanae thomasianae powder 20-30, water 160-200;

Described novel water reducer is made up of the raw material of following weight parts:

Polycarboxylate water-reducer 20-30, Sodium Silicofluoride 3-4, ethylene glycol 0.8-1, ammoniacal liquor 1-2, silane coupling agent KH560 0.1-0.2;

Ethylene glycol is mixed with ammoniacal liquor, obtains alcohol ammonia solution after stirring, add Sodium Silicofluoride, insulated and stirred 10-20 minute at 30-35 DEG C, adds silane coupling agent KH560,100-120 rev/min of dispersed with stirring 4-6 minute, add polycarboxylate water-reducer, stir, to obtain final product.

2. a preparation method for anti-crack concrete as claimed in claim 1, is characterized in that comprising the following steps:

(1) joined by metaboric acid in 10-20 times of water, add calcium stearate, nano silicon, be uniformly mixed 20-30 minute, add aluminium dihydrogen phosphate after stirring, raised temperature is 40-45 DEG C, 100-160 rev/min of dispersed with stirring 6-10 minute, obtains aluminium glue liquid;

(2) stove dirt being sent into concentration is soak 1-2 hour in the sodium hydroxide solution of 4-6%, takes out rear and polypropylene powder mixing and stirring, adds above-mentioned aluminium glue liquid, stir, and adds each raw material of residue, stirs, obtain described anti-crack concrete.