Asphalt Testing equipments in Malaysia by Kenco

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ROCK

		Core trimmer and cut-off machine Used to obtain rock samples perfectly machine (cubes, prisms, etc.) from irregular rock or core pieces. It is supplied complete with a proper vice to hold irregular pieces firmly in place up to 70x140mm approx. Another “V” vice is used to cut cores to a maximum size 75 mm dia. X 140 mm height.

		(Franklin Press) Rock strength index apparatus (digital) The apparatus consists of a load frame 60 kN capacity with a hydraulic loading ram actuated by a hand pump. The frame is adjustable to allow for testing sample up to 102 mm dia.

		Permeability of rock constant head type This apparatus provides an infinitely variable constant pressure and is used in conjunction with the Hoek cell fitted with the permeability end caps, for the investigation of the permeability of rock at high confining pressures in the laboratory.

		Polished stone value Used to measure the resistance of road stone to the polishing action of vehicle tires on a road surface. This machine provides a method of preparing polished stone specimens for use with the friction tester when used in a laboratory environment.

		Rock classification hammer (Schmidt hammer – Low impact energy model) Used to measure the rebound index on rock cores and samples. The apparatus is simple, easy to use, and is similar to the one used for testing concrete. The level of impact energy only is different: 0.74 Nm. Rock cores are positioned horizontally and the rebound index is obtained from the average of several measurements performed perpendicularly to the longitudinal axis.

		Rock test systems (Advantest 9) Elastic modulus and strength characteristics of rock specimens in uniaxial and triaxial conditions Rock mechanics automatic test systems are designed to test various materials from soft sandstone to high strength basaltic samples. During the test the compression load on the rock specimen shall be applied continuously without shock, in such a manner to produce a strain rate as constant as possible, so that failure will occur within 5-10 min of loading or alternatively at a constant rate of stress, within the limits of 0.5-1.0 MPa/sec. For triaxial tests, the confining pressure has to be maintained constant to within ± 1%.

		Skid resistance tester This method provides a measure of the skid resistance properties of a surface either in the field or in the laboratory. This method measures the skid resistance of a small area of a surface (approximately 0.01 m2) and this should be considered when deciding its applicability to a pavement surface which may have variable surface characteristics, e.g. block paving.

		Slake durability index apparatus This apparatus can be used for splitting tensile strength on rock disk 54 mm dia.Platen dia. Is 75 mm. Total height 188 mm. Assess the deterioration of rocks over a period of time when subjected to water immersion. The apparatus consists of a motorised drive unit which is mounted on a baseplate and which can rotate two or four drums at a speed of 20 r.p.m.

		Splitting tensile test of intact core specimens This test method has been developed to measure the uniaxial tensile strength of rock specimens by the diametral compression of a disk. The test specimens shall be a circular disk with a thickness-to-diameter ratio (L/D) between 0.2 and 0.75.