Reactive powder concrete as well as preparation method and application thereof
A technology of reactive powder and concrete, applied in the field of concrete materials, can solve the problem of insufficient strength of reactive powder concrete, and achieve the effects of good resistance, high compressive strength and tensile strength, and less cement.
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Embodiment 1
[0028] Example 1: The ingredients are 690 parts of cement, 100 parts of silica fume, 250 parts of fly ash, 357 parts of quartz sand of 30-40 mesh, 373 parts of 45-100 mesh, 302 parts of 100-150 mesh, 156 parts of steel fiber, water 210 parts, 32 parts of water reducer, 70 parts of nano minerals, 26 parts of graphene oxide.
[0029] Among them, the cement is Lvyang brand P·O 52.5 ordinary Portland cement. The indicators of the cement meet the quality requirements of GB175-2007 "Portland Cement, Ordinary Portland Cement".
[0030] Fly ash is Class I fly ash produced by Kuoteng Mineral Products Processing Plant in Lingshou County, with a density of 2.6g / cm 3 , the specific surface area is 600m 2 / kg.
[0031] Silica fume is selected from the silica fume produced by Shanghai Shengkuo Chemical Technology Co., Ltd. SiO 2 The content is 94%, and the bulk density is 330kg / m 3 , bulk density is 1700kg / m 3 , with an average particle size of 0.2μm and a specific surface area of ...
Embodiment 2
[0050] Embodiment 2, embodiment 3 are all consistent with embodiment 1 except the proportioning of composition.
[0051] Among them, the ingredients of Example 2 are 670 parts of cement, 105 parts of silica fume, 265 parts of fly ash, 377 parts of quartz sand of 30-40 mesh, 364 parts of 45-100 mesh, 291 parts of 100-150 mesh, and 167 parts of steel fiber , 198 parts of water, 35 parts of water reducer, 74 parts of nano minerals, and 25 parts of graphene oxide.
[0052] Its compressive strength is shown in Table 2:
[0053] The active powder concrete compressive strength of table 2 embodiment 2
[0054] Test block number Compressive strength (MPa) Test block 1 228.3 Test block 2 233.6 Test block 3 218.4 average value 226.8
Embodiment 3
[0055] The composition of embodiment 3 is 710 parts of cement, 110 parts of silica fume, 234 parts of fly ash, 381 parts of quartz sand 30-40 mesh, 352 parts of 45-100 mesh, 294 parts of 100-150 mesh, 151 parts of steel fiber, water 218 parts, 31 parts of water reducer, 68 parts of nano minerals, 26 parts of graphene oxide.
[0056] Its compressive strength is shown in Table 3:
[0057] The active powder concrete compressive strength of table 3 embodiment 3
[0058] Test block number Compressive strength (MPa) Test block 1 254.2 Test block 2 244.7 Test block 3 262.6 average value 253.8
[0059] It can be seen that the average compressive strength of the active powder concrete of the present invention is 225-270MPa, and can even reach more than 270MPa in some specific proportions.
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