Profile: G C T S provides selection and design of laboratory & in-situ testing apparatus, and software ranging from modification & adaptation of existing apparatus to the purchase of new closed-loop computer-controlled systems. Our products include servo-pneumatic asphalt testing system, servo controlled superpave gyratory compactor, direct shear testing system for asphalts, large scale soil tri-axial cell, uni-axial testing system, rapid tri-axial rock testing system, direct shear testing system for soils, dynamic hollow cylinder testing system, advanced computer aided testing software, point load test software, LVDT calibration device, temperature control system, ultrasonic velocity test systems & diffused air flushing device. The servo-pneumatic asphalt testing system is capable of performing the full spectrum of HMA tests, and the dynamic hollow cylinder testing system is capable of simulating most field stress/strain path tests.