Abstract A Very High-Performance Concrete (VHPC) has compressive strength in the range 120-150 MPa and high flowability. However, there is no VHPC mix as a repairing grout Indonesia. This study presents design of using Indonesian by-product materials to achieve 120 MPa. sequence experimental method determined suitable material replace fine sand, ground quartz superplasticizer. Then, optimum was...

The performances of cementitious materials as well as the efficiency of construction are adversely affected at high temperatures. Previous studies have already demonstrated that ultra-fine (alccofine) material accelerates the hydration of cement particles and subsequently improves the mechanical and durability properties of the concrete at normal temperature. Moreover, at higher temperatures th...

Abstract Ultra-high performance concrete is characterized by its high strength and toughness, ceramsite can absorb energy function as a buffer. Based on the mechanical properties of both, two kinds materials are combined in spatial structure, three structural models, namely, gradient structure group target, double stacked single material designed prepared. Then, dynamic characteristics protecti...

Background: In megavoltage radiotherapy rooms, ordinary concrete is usually used due to its low construction costs, although higher density concrete are sometimes used, as well. The use of high-density concrete decreases the required thickness of the concrete barrier hence, its disadvantage is its high cost. In a nuclear reactor, neutron radiation is the most difficult to shield. A method for p...