Research On Rainwater Collecting System In Porous Concrete Road

Abundant water resources in Zhenjiang due to it locates by the Changjiang River.However,lots of lakes and rivers were polluted because of the lack of environment protection as the development of economic.As a result,quality-induced water shortage appeared in Zhenjiang and many place form a difficult situation that people could't use so much water.In addition,the rain as a kind of clean and value resources usually can't be collected and reused and make the water wasted.The situation is against to the construction of the city.The paper was based on many articles at home and abroad and the research results in our team,sponge of urban ecological environment construction as background,the porous concrete as material,the porous concrete lighten road as main part,the rainwater collection and treatment as method to design a rainwater collection system in porous concrete road.It was the aim that saved the material and energy,adjusted and balanced the ecological environment,created ecological?social and economic benefits.In the end,we can achieve the goal of sustainable development.In the paper,new type porous concrete was used to make up the porous concrete road.What's more,the reliability of the road was verified by the limit probability analysis.A rainwater collection system based on the porous concrete road is designed.The main research contents have the following several aspects.(1)Admixtures such as ZS-3 and Etonish845 were added into the concrete so that to enhance the workability and the hardening strength of the cement.Increase the adhesive property between the coarse aggregates and improve the physical property and mechanical strength of the concrete.The physical properties of the concrete(compressive strength?flexural strength?porosity?permeability coefficient)were tested by changing the water cement ratio(w/c)?admixture content?aggregate size?cement thickness etc.in order to achieve the optimization of concrete made and mix proportion.(2)Porous concrete road which made up with porous concrete that mix proportion is optimization.The advantages and disadvantages of permeable road and impermeable road were compared.Come up with the design principle of permeable road.Judge the permeability coefficient of the permeable road whether meet requirements or not based on the 30 year maximum rainfall intensity in Zhenjiang.Design the thickness and strength of the road structure layer.Using the concept of the reliability then check the road structure whether meet related specification or standard.In the end,the permeable road structure was confirmed.(3)In order to realize integration of the emission?storage and supply water design a rainwater collection system which can collect and purified?treat and regulate?discharge and reuse the rainwater based on research in domestic and overseas.Calculate and design grit chamber?constructed wetlands and storage pond and so on.Set up a monitoring system to monitor and forewarning the water quality condition in rainwater collection system.Combine porous ecology concrete and plant-growing ecological concrete to build a small ecosphere via biological accumulation and purification.In this way the rainwater collection system can adjust the physioclimate and add the underground water so that to get the purpose of environmental friendly and sustainable development.At last analyze the social benefit and economic benefit for the permeable concrete road rainwater collection system.