Reactive powder concrete and preparing method thereof
A technology of active powder and concrete, which is applied in the field of building materials, can solve the problems of insufficient tensile strength, poor volume stability, and high investment in steel structures, and achieve the effects of improving uniform dispersion, good volume stability, and high toughness
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Embodiment 1
[0033] An active powder concrete, mainly made of the following raw materials in parts by weight: 705 parts of cement, 210 parts of active mineral powder, 360 parts of coarse sand, 724 parts of medium sand, 180 parts of fine sand, 105 parts of fine steel fiber, polypropylene 15 parts of fiber, 65 parts of high-performance water reducer, 125 parts of water, 8 parts of iron powder, and 5 parts of borate coupling agent.
[0034] When preparing, determine the mixing ratio of the above raw materials; set aside; then add quartz sand and fine steel fiber into the mixer and stir for 6 minutes. Then add cement, active mineral powder and polypropylene fiber and stir for 2 minutes. Then add water, water reducer, iron powder, and borate coupling agent and stir for 4 minutes to obtain active powder concrete. During the mixing process, a twin-shaft forced mixer was used with a speed of 45 r / min. It was determined that the compressive strength of the active powder concrete obtained was 161....
Embodiment 2
[0036] An active powder concrete, mainly made of the following raw materials in parts by weight: 720 parts of cement, 210 parts of active mineral powder, 350 parts of coarse sand, 710 parts of medium sand, 170 parts of fine sand, 165 parts of fine steel fiber, polypropylene 16 parts of fiber, 67 parts of high-performance water reducing agent, 130 parts of water, 7 parts of iron powder, 4 parts of borate coupling agent.
[0037] When preparing, first determine the mixing ratio of the above raw materials; set aside; then add quartz sand and fine steel fiber into the mixer and stir for 6 minutes. Then add cement, mineral powder and polypropylene fiber and stir for 2 minutes. Then add water, water reducer, iron powder, and borate coupling agent and stir for 4 minutes to obtain active powder concrete. During the mixing process, a twin-shaft forced mixer was used with a speed of 45 r / min. It was determined that the compressive strength of the active powder concrete obtained was 17...
Embodiment 3
[0038] Embodiment 3: basically the same as Example 1, the difference is: 190 parts of active mineral powder, 690 parts of cement, 300 parts of coarse sand; 690 parts of medium sand; 105 parts of fine sand; 12 parts of polypropylene fiber, fine steel fiber 80 parts, 65 parts of high-performance water reducer, 115 parts of water, 6 parts of iron powder, 3 parts of borate coupling agent.
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