|Table of Contents|

Design method of no-fines porous concrete composition based on vibration compaction(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2012年02期
Page:
1-9
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Design method of no-fines porous concrete composition based on vibration compaction
Author(s):
HU Li-qun; SHA Ai-min; ZHANG Sha-sha
School of Highway,Chang’an University,Xi’an 710064,Shaanxi,China
Keywords:
road engineering;  no-fines porous concrete;  paste viscosity;  vibration compaction;  material composition
PACS:
U414
DOI:
-
Abstract:
The viscosity change rules of cement pastes,cement fly-ash pastes and cement silica fume pastes with different water to powder ratios were studied by using paste penetration test.Paste adhesive capacity to aggregate and paste leakage condition were analyzed based on mixture mixing test and vibration compaction test,and the design method of no-fines porous concrete composition at vibration compaction condition was provided.Analysis result indicates that in the mixing process of mixture,the amount of paste adhered to aggregate increases firstly and then decreases with the increase of paste penetration value,and paste adhesive ability is great when penetration value is 20-40 mm.Penetration value is further narrowed to 20-25 mm to avoid paste leakage and specimen damage at vibration compaction condition.No-fines porous concrete with 21.8% void ratio is designed by using the method,pore distribution in specimens is uniform,and 28 d compressive strength and flexural strength can reach 22.8 MPa and 3.4 MPa respectively.9 tabs,8 figs,18 refs.

References:

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Memo

Memo:
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Last Update: 2012-04-30