Experimental Study On Macroporous Ecological Concrete

In recent years, with china’s rapid economic development, the marine industry hasseen rapid development. The development of marine fisheries, coastal industry,tourism and port economy has had a strong natural coastal artificial modification, landexpansion needs, which leads to a serious imbalance in coastal ecosystems, wetlandecological buffer zone-the original disappeared and brings enormous pressure to thecoast of the natural environment and ecological system.This article relies on ocean nonprofit research and special (201005007)-"Atypical artificial coast of ecological construction technology integration anddemonstration" projects, combined with the latest research status at home and abroad tostart macro-porous eco-concrete present experimental study. The main contents of thispaper is to prepare high-performance macro-porous ecological concrete. Taking intoaccount the functional needs, this paper macro-porous ecological concrete objectives ofthe porosity, is15percent,20percent and25percent. First of all, study specificpreparation technique of porosity of porous eco-concrete is first raised on fresh concretebulk density of porous eco-concrete porosity control methods. On this basis, fixedcement dosage for300kg/m~3,350kg/m~3,400kg/m~3and450kg/m~3, one doped with flyash and slag power to adjust the porosity of porous concrete porosity of different targets,respectively (15%,20%and25%), macro-porous eco-concrete without sand;70%PO42.5cement+30%fly ash cementitious materials, cementitious material contentrespectively for the300kg/m~3,350kg/m~3,400kg/m~3and450kg/m~3conditions, bymixing the natural preparation of fine aggregate to adjust the porosity of fly ash sandporous eco-concrete.70%PO42.5cement+30%slag power cementitious materials,respectively in cementitious material content for300kg/m~3,350kg/m~3,400kg/m~3and450kg/m~3condition, by mixing natural fine aggregate slag sand preparation to adjust theporosity of porous eco-concrete. A specific study with fly ash and mine slag power istwo series of major hole ecological concrete porosity and mechanics performance,based on mechanics performance of the research, as well as the economic,considerations, we used sand porous ecological concrete durability as objects of study, each of the anti-freeze performance lab research and anti-sulphate corrosion research.Research has shown that:1. Based on fresh concrete bulk density of porous eco-concrete porosity controlmethods can be effective to control porosity of macro-porous eco-concrete.2. Macro-porous ecological concrete compressive strength with decreasingporosity increases, the maximum porosity of15%of the large hole28d compressivestrength of concrete up to27MPa; porosity of20%of large maximum aperture28dcompressive strength of concrete reaches22MPa, porosity25%28d macro-porousconcrete compressive strength can reach21MPa.3. Freeze-thaw resistance of porous eco-concrete for the overall poor performance,slag power group macro-porous eco-concrete freeze-thaw resistance superior set ofmacro-porous eco-concrete containing fly ash. Freeze-thaw resistance with increasedporosity decreases the fast-freeze-thaw experiment, frost resistance of the bestexperimental75freeze-thaw cycle can be achieved, in slow-freezing experiments,frost-resistant it is best to get100freeze-thaw cycles.4. Sand macro-porous ecological concrete, which single doped30%of fly ash and30%of slag powder, continues to maintain good performance of sulfate resistance.