Case Studies of High-strength Lightweight Concrete Using Expanded Siliceous Aggregate

Abstract

Structural lightweight concrete has various applications including the construction of multi-story buildings, bridges, offshore oil platforms and other reinforced concrete structural elements. Structural lightweight concrete also was used in offshore construction. The development of compositions of high-strength lightweight concrete with an average density of 1100-1500 kg/m3 may be in demand for the manufacture of most of the typical concrete products with an ordinary strength 20-35 MPa. This study have shown that granular expanded siliceous aggregates can be used as an alternative to hollow microspheres to obtain high mechanical characteristics of lightweight concrete. Based on the principles of producing high-strength lightweight concrete using the example of "Thermogran" granules the possibility of achieving strength of lightweight concrete of more than 45 MPa with an average density of less than 1600 kg/m3 is shown. In the same time, specific consumption of cement on 1 MPa of concrete strength is 8.1...8.8 kg/MPa.