养护条件对掺再生微粉活性粉末混凝土力学性能影响研究

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中图分类号：TU528.31 文献标志码：A DOI： 10.15935/j.cnki.jggcs.20240624.001

AbstractReactive Powder Concrete（RPC） is an ultra-high performance cement-based composite material. Recycled powder is produced from waste concreteand waste brick by crushing and grinding.It includes unhydrated particles and could act as complementary cement materials for RPC.This paper studied the flexural， compressive strength at 3 d， 7d ，28 d and axial compressive strength，elastic modulus at 28 d under two different curing conditions （steam curing and standard curing）. Results show that steam curing greatly increases flexural and compressive strength of RPC at 3 d and 7 d. Steam curing improves the compressive strength and axial compressive strength at28d，but decreases 28 d flexural strength and has litle efct on 28 d elastic modulus. In addition，steam curing reduces flexural strength to compressive strength ratio （toughness and crack resistance）.Then ANSYS was used to simulate the mechanical properties of recycled RPC concrete at the mesoscopic level，and the simulation fits well with the experiments.

KeywordsRPC，recycled powder，curing condition，mechanical properties，elastic modulus

0 引言

活性粉末混凝土（ReactivePowderConcrete，或称RPC）问世于1990年左右，后由法国Bouygues公司推广，是一种新型建筑材料。（剩余16364字）