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A concrete and mixture technology, applied in the field of concrete and its preparation, can solve problems affecting concrete compressive strength, concrete cracks, etc., and achieve the effects of improving work performance, reducing cracks, and increasing compactness
Active Publication Date: 2019-02-22
杭州金鼎实业有限公司
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Problems solved by technology
However, the ordinary Portland cement used as raw materials in the prior art will rapidly release heat during the hydratio
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Embodiment 1
[0066] Embodiment 1: A kind of concrete, the raw material component that comprises and corresponding weight parts thereof are as shown in Table 1, and obtain through the following steps preparation:
[0067] Step 1: Weigh silica fume and natural sand according to the ratio of parts by weight, and mix them with water accounting for 60% of the total weight and parts ratio of silica fume and natural sand, then add modified calcium carbonate, and the stirring speed is 200r / min , stirred for 15 minutes, and mixed uniformly to obtain the first mixture;
[0068] Step 2, take machine-made sand, gravel, glass fiber, tempered fiber, basalt fiber according to the number of parts by weight, and then add it to the first mixture obtained by step A, stir at a speed of 500r / min, stir for 15min, and mix evenly to obtain the second mixture;
[0069] Step 3: Weigh low-heat composite cement, Class II coal ash, mineral powder, polycarboxylate water reducer, hydroxycarboxylate water reducer, napht...
Embodiment 2-8
[0077] Embodiment 2-8: A kind of concrete, the difference from Embodiment 1 lies in that the raw material components and their corresponding parts by weight are shown in Table 1.
Embodiment 9
[0078] Embodiment 9: A kind of concrete, the difference from Example 1 is that in the step 3 of the preparation method, the low-heat composite cement is composed of 85wt.% low-heat portland cement clinker and 6wt.% sulfur aluminum Composition of acid cement clinker, 9wt.% gypsum and 5wt.% magnesium oxide.
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Abstract
The invention discloses concrete and a preparation method thereof, and belongs to the field of building materials. The concrete comprises the following raw materials in parts by weight: 280-360 partsof low-heat composite cement, 45-65 parts of II-level coal ash, 45-65 parts of mineral powder, 33-45 parts of silica fume, 480-540 parts of machine-made sand, 200-240 parts of natural sand, 910-940 parts of stones, 60-80 parts of reinforced fibers, 20-25 parts of modified calcium carbonate, 12-16 parts of a water reducing agent, and 180-200 parts of water. The reinforced fibers comprise at least one of glass fibers, tempered fibers and basalt fibers. The water reducing agent comprises at least one of a polycarboxylic acid water reducing agent, a hydroxycarboxylate water reducing agent, and a naphthalene water reducing agent. The provided concrete has the advantages of effectively reducing hydration heat of the concrete, and improving compressive strength of the concrete.
Description
technical field [0001] The invention relates to the field of building materials, more specifically, it relates to a concrete and a preparation method thereof. Background technique [0002] As one of the most important building materials at present, concrete is used in almost all modern buildings. However, due to the fact that the interior of the concrete must be mixed with air during application, cracks are often formed after solidification. [0003] The Chinese patent with the authorized announcement number CN103951348B and the authorized announcement date on September 30, 2015 discloses a kind of concrete, including sand, gravel and anti-cracking composite cement in conventional proportions, wherein the anti-cracking composite cement includes: ordinary silicic acid 100 parts of salt cement, 5-20 parts of iron powder, 0.5-1.5 parts of sodium sulfite powder, 10-30 parts of fly ash. [0004] Although the prior art is doped with iron powder in the raw material, the iron powd...
Claims
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