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A platform for research: civil engineering, architecture and urbanism
The invention provides a non-autoclaved PHC concrete pipe pile. Concrete is poured into a reinforcement cage, centrifugal forming is carried out, so that the pipe pile can be obtained. The concrete mortar contains water, cement, fine aggregate, coarse aggregate, mineral admixture and a high-efficiency water reducing agent; the fine aggregate is selected from particles with the diameter of 1-3 mm which are obtained after stone is crushed; the coarse aggregate is clean siliceous macadam, the mud content of the coarse aggregate is controlled to be less than 0.5%, the needle sheet content of the coarse aggregate is controlled to be less than 8%, and particularly, the macadam should be continuously-graded siliceous macadam of which the strength is 120 Mpa and of which the particle size should be 5-25 mm; the mineral admixture is fly ash, ground fine sand and natural silicon powder; the high-efficiency water reducing agent is a BNS solution (p-naphthalene sulfonic acid formaldehyde condensate). When the prestressed concrete pipe pile is naturally cured after being subjected to natural steam curing, the bending resistance of the pipe pile meets the requirements of national standards.
本发明所提供的一种免蒸压PHC混凝土管桩，该管桩由钢筋笼灌入混凝土，并经离心成型，所述的混凝土砂浆内含水、水泥、细集料、粗集料、矿物掺和料和高效减水剂；所述的细集料选用石头破碎后直径1‑3mm颗粒；所述粗集料为洁净的硅质碎石，含泥量控制在0.5％以下，针片状含量控制在8％以下，尤其是石子的强度应在120Mpa，粒径5—25mm连续级配的地产硅质碎石；所述矿物掺和料为粉煤灰、磨细沙和天然硅粉；所述的高效减水剂为BNS溶液(p一萘磺酸甲醛缩合物)；本发明制备的预应力管桩混凝土在自然蒸汽养护后进行自然养护时管桩的抗弯性能符合国家标准的要求。
The invention provides a non-autoclaved PHC concrete pipe pile. Concrete is poured into a reinforcement cage, centrifugal forming is carried out, so that the pipe pile can be obtained. The concrete mortar contains water, cement, fine aggregate, coarse aggregate, mineral admixture and a high-efficiency water reducing agent; the fine aggregate is selected from particles with the diameter of 1-3 mm which are obtained after stone is crushed; the coarse aggregate is clean siliceous macadam, the mud content of the coarse aggregate is controlled to be less than 0.5%, the needle sheet content of the coarse aggregate is controlled to be less than 8%, and particularly, the macadam should be continuously-graded siliceous macadam of which the strength is 120 Mpa and of which the particle size should be 5-25 mm; the mineral admixture is fly ash, ground fine sand and natural silicon powder; the high-efficiency water reducing agent is a BNS solution (p-naphthalene sulfonic acid formaldehyde condensate). When the prestressed concrete pipe pile is naturally cured after being subjected to natural steam curing, the bending resistance of the pipe pile meets the requirements of national standards.
本发明所提供的一种免蒸压PHC混凝土管桩，该管桩由钢筋笼灌入混凝土，并经离心成型，所述的混凝土砂浆内含水、水泥、细集料、粗集料、矿物掺和料和高效减水剂；所述的细集料选用石头破碎后直径1‑3mm颗粒；所述粗集料为洁净的硅质碎石，含泥量控制在0.5％以下，针片状含量控制在8％以下，尤其是石子的强度应在120Mpa，粒径5—25mm连续级配的地产硅质碎石；所述矿物掺和料为粉煤灰、磨细沙和天然硅粉；所述的高效减水剂为BNS溶液(p一萘磺酸甲醛缩合物)；本发明制备的预应力管桩混凝土在自然蒸汽养护后进行自然养护时管桩的抗弯性能符合国家标准的要求。
Non-autoclaved PHC concrete pipe pile
一种免蒸压PHC混凝土管桩
ZHANG JIANHUA (author)
2020-10-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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