Color concrete and preparation method thereof

[0027] The ratio of raw materials is as follows: (unit: Kg / m 3 )

[0028]

[0029] Wherein: the above components meet the following indicators:

[0030] Cement: white Portland cement, whiteness not lower than grade two, the residue passing through a 0.8mm square hole sieve shall not exceed 10%, initial setting time ≥ 45min, final setting time ≤ 720min;

[0031] Through experiments, it is found that in the color cement process, the gray tone will weaken any color, making the color not pure and bright enough, and the gray tone cement will use a larger dose of pigment when preparing colored cement , which increases the preparation cost, so the present invention adopts white Portland cement with whiteness not lower than grade two;

[0032] Sand: medium sand in Zone II, mud content ≤ 3%;

[0033] Stone: crushed stone with a diameter of 5~16mm and a mud content of ≤2%;

[0034] Water: tap water or ground water;

[0035] Limestone mineral powder: white powder, 800 mesh, CaCO

[0052] The ratio of raw materials is as follows: (unit: Kg / m 3 )

[0053]

[0054] Wherein: the above components meet the following indicators:

[0055] Cement: white Portland cement, whiteness not lower than grade two, the residue passing through a 0.8mm square hole sieve shall not exceed 10%, initial setting time ≥ 45min, final setting time ≤ 720min;

[0056] Sand: medium sand in Zone II, mud content ≤ 3%;

[0057] Stone: crushed stone with a diameter of 5~16mm and a mud content of ≤2%;

[0058] Water: tap water or ground water;

[0059] Limestone mineral powder: white powder, 800 mesh, CaCO 3 Content ≥ 70 (%), magnesium content ≤ 34 (%), iron content ≤ 11 (%);

[0060] White carbon black: content 98-99.9%, 2000-8000 mesh;

[0061] Admixture: polycarboxylate high-performance water reducer, concentration 20%, water reducing rate ≥ 25%;

[0062] Pigment: blue pigment cobalt oxide, green powder, oil absorption: 16-20g / 100g, density: 4.01-5.01g / cm 3 , PH value: 7-9;

[0075] The ratio of raw materials is as follows: (unit: Kg / m 3 )

[0076]

[0077] Wherein: the above components meet the following indicators:

[0078] Cement: white Portland cement, whiteness not lower than grade two, the residue passing through a 0.8mm square hole sieve shall not exceed 10%, initial setting time ≥ 45min, final setting time ≤ 720min;

[0079] Sand: medium sand in Zone II, mud content ≤ 3%;

[0080] Stone: crushed stone with a diameter of 5~16mm and a mud content of ≤2%;

[0081] Water: tap water or ground water;

[0082] Limestone mineral powder: white powder, 800 mesh, CaCO3 content ≥ 70 (%), magnesium content ≤ 34 (%), iron content ≤ 11 (%);

[0083] White carbon black: content 98-99.9%, 2000-8000 mesh;

[0084] Admixture: polycarboxylate high-performance water reducer, concentration 20%, water reducing rate ≥ 25%;

[0085] Pigment: light yellow pigment iron oxide yellow, Fe2O3 content ≥ 86%, moisture 1.0 ≤%, oil absorption 25~35 (ml / 100g), pH va