Graded Gravel Mix Designand Construction Quality Control

In recent years, with the development of China's economic construction, highway construction projects substantial growth, increasing the level of modern construction, in order to ensure the quality, reduce costs, and striving for quality engineering, combined with years of practice, review and explore the common grading gravel layer materials, mix design, construction technology and quality control.Recommended in the standard framework based on dense graded crushed stone, through filling test, the optimization of the skeleton structure; through raw material selection, performance, quality and quality improvement measures to improve the quality of graded crushed stone material; by compaction test, CBR, compressive modulus and impact of laws such as the amount of sand mixed with test its mechanical properties. The results show that appropriate control of raw materials can improve the quality of their performance, design grading has good mechanical properties, can be used for large-scale construction operations for the promotion of graded gravel cushion provides a good technical support.Through the test section of the test shop, proposed construction quality control measures, first of all raw materials and strict quality control of crushed stone, followed by strict control of graded crushed stone material gradation, mixture again to ensure uniform spreading and rolling compaction. For its construction quality control of raw materials and grading, proposed mixture of dry sieve sampling, product mix and other measures to detect the moisture content of the quality of mixing plant mixing; made during construction to prevent and reduce the segregation of the method, and for paver in the mixture after the segregation situation in different locations, through the screening test by the isolation and provided data analysis solutions.Mixture while mixing, transport, spreading and rolling process, analytical quality control methods to improve construction quality graded gravel.Graded gravel cushion on the highway construction technology of the system, put forward for bao three graded gravel cushion highway construction quality control indicators, good effect in practical application.