Sand patch test procedure

Identify and make investigation to confirm that slippery is one of the main cause of accident. For new road surface, it is recommended that sand patch test for. Volumetric or sand patch method has historically been used as the main technique for measuring macrotexture. The following table describes steps used in the sandpatch method of measuring the texture depth of concrete surfaces. This test method is used to assess the surface texture depth. Comparison of pavement surface texture determination by. Volumetric sand patch tests performed on an exposed aggregate. To determine that slippery is one of the main cause of accident. Surface texture depth by sand patch method bs598 part 105. Test area is to be clear of cracking and the pavement area must be dry. Accurate sand patch testing cannot be carried out when road surface is sticky or wet. In recent years, road administrations face the issues of handling data. Measuring texture depth by the sandpatch method step action. Ensure the pavement surface is clear of debris by sweeping the surface with a small brush.

The road surface texture can be measured by sand patch method. This method describes a procedure for determining the average texture depth of a selected portion. Pavement surface texture has been assessed with variety of test methods such as sand patch test and multi laser profiler. How to test your soil texture sand, silt, clay composition duration. This test procedure covers the determination of the average texture depth of a paved surface using sand to give the volume of voids. Spread the sand with the spreading disc to form a circular patch. To know the road surface condition that danger to users. Central west local land services recommended for you. This amount weight of sand should then be used for every sand patch test.

Comparison of pavement surface texture determination by sand patch test and 3d laser scanning article pdf available in periodica polytechnica civil engineering 45. The pavement surface selected for test must be dry. Repeat this procedure a minimum of ten times to determine the average weight of sand. The method is suitable for bituminous surface course and concrete pavement surface with texture depth greater than 0. Repeat this procedure a minimum of ten times to determine the average weight of sand required to fill the cylinder. The method is suitable for the measurement of surfaces with average texture depths greater than 0. Standard test procedure for measurement of texture by the. Sand for several tests may be weighed in advance and stored in the small plastic or metal containers. This video demonstrates the sand patch test used to measure macro texture on pavement in accordance with mp 401. Texture depth determined by the sand patch method is a measure of the surface macrostructure.