Research on concrete preparation technology of C100 machine-made sand non-autoclaved pipe pile
In order to realize the production process of energy saving and low carbon,C100 machine-made sand non-autoclaved pipe pile are popularizing and applying.The special mineral admixtures for pipe pile mainly contains Ⅰ fly ash,ultra-fine fly ash,silica fume and machine-made sand were used to test and mix the concrete for non-autoclaved pipe pile.The effects of the mineral admixtures,the total amount of cementitious materials,the water-cement ratio,the static stop time and the heating rate on the performance of the concrete for pipe piles were studied.The results show that the non-autoclaved pipe pile concrete suitable for manual distribution mode of mold opening was prepared by optimizing the mix design parameters and steam curing system,the quality of the inner wall after centrifugal molding is good.The compressive strength of steam curing demoulding,3 d and 28 d exceeds 95 MPa,100 MPa and 105 MPa respectively,and the chloride ion migration coefficient of steam curing demoulding and 28 d is lower than 4×10-12 m2/s、3×10-12 m2/s.
C100machine-made sand non-autoclaved pile concretemix designsteam curing system
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维普
