Research On Engineering Technology Of Luminous Permeable Concrete Pavement

In recent years,China's rural revitalization strategy and urbanization development have continued to advance,and the scale of road construction has increased day by day.Therefore,some water bodies and land in villages and towns are successively covered with non-permeable hardened road surfaces,such as concrete and asphalt,which caused the heat island effect and flood disasters,etc.The emergence of permeable concrete pavement can solve those problems as the continuous development of materials science.Nowadays,permeable concrete pavement has been widely used in the construction of village and town roads and the luminous permeable concrete pavement has been developed on the basis.It can beautify villages and towns at night and serve as a safety warning at the same time.In addition,it can further meet the needs of street lighting-free places and village and town tourism construction.At present,there are few reports about the luminous permeable concrete pavement engineering,and the domestic and foreign research of it has focused on the mechanical properties and water permeability but not the engineering technology,the water retention and the water evaporation.Therefore,in order to enrich the diversity of energy-saving and environmentally-friendly permeable pavements and to promote the application of luminous permeable concrete pavement in the construction of village and town roads,this paper conducted a study on the basic properties of luminous permeable concrete,such as the mechanics,permeability and water retention,and its pavement engineering technology.The main research contents and conclusions are as follows:(1)Study the technological principles of luminous permeable concrete through doing research,reading literature,and participating in practical engineering.It mainly includes the performance reQuirements,Quality parameters,design principles and preparation processes,etc.And provides guidance to techniQue of pavement engineering.(2)Prepare luminous permeable concrete and water-permeable concrete test pieces(10 cm×10 cm×10 cm).The former has a light-emitting area with a size of 8 cm×8cm×1 cm.The two groups of samples were tested and analyzed for porosity,water permeability,water retention,water evaporation and compressive performance.The study found that:(1)the porosity of luminous permeable concrete is about 3% smaller than that of permeable concrete;(2)the permeability of permeable concrete has a positive correlation with its porosity,and the permeability of luminescent concrete is about2.22mm/s smaller than that of permeable concrete;(3)The water-retaining capacity of permeable concrete is 0.18 g / cm2 higher than that of permeable concrete.(4)The luminous permeable concrete has a better effect of evaporation and cooling;(5)The concrete strength of the luminous stone is increased by about 1.6MPa.(3)Conduct comparison test of the impact of luminous and permeable concrete pavement and various pavement pavements on the thermal environment in spring and summer,which mainly refers to the standard of "Ground Meteorological Observation Standards for Air Temperature and Humidity" GB/T35226-2017.The surface temperature of three types of road surfaces and the air temperature and humidity index at 1.5 meters above it were tested.The results show that,in spring and summer,the surface temperature of the light-permeable concrete pavement and the air temperature1.5 meters above it are lower than those of the permeable concrete pavement and the ordinary concrete pavement.And the relative humidity of the air 1.5 meters above it is higher than that of the permeable concrete pavement and the ordinary pavement;Especially at the same time in summer,comparing the luminous permeable concrete pavement with permeable concrete pavement and the ordinary concrete pavement,the maximum difference of daytime surface temperature reach to 7.7? and13.8? respectively;the air temperature ratio 1.5 meters above it are 3.2? and 6.1?lower respectively;the relative humidity of the air 1.5 meters above it are 6.8% and11.2% higher respectively.Thus,the luminous pervious concrete pavements have good ecological performance and could relieve the heat island effect especially in summer.(4)This article described the base treatment,construction points,permeable concrete mixing and transportation,permeable concrete paving,pavement cutting andfilling,luminous surface layer laying of luminous permeable concrete pavement by participating in the practice engineering.process flow and construction technology of luminous permeable concrete pavement.And discussed the economic benefits and ecological effects of the completed project,which provides a practical basis and reference basis for the engineering application of luminous permeable concrete pavement.Luminous and permeable concrete pavement not only has more prominent value in engineering economic benefits,but also can bring long-term benefits to ecological construction.