reactive powder concrete (rpc) is an ultra high performance concrete which has superior mechanical and physical properties. the rpc is composed of cement and very fine powders such as crushed quartz (100–600 μm) and silica fume with very low water/binder ratio (w/b) (less than 0.20) and super plasticizer (sp). the rpc has a very high compressive and tensile strength with better durability prope...

Fiber-reinforced cement composites (FRCC) are widely used in the construction of houses and commercial buildings many countries such as United States, Kingdom, European countries, Asian China, India, Thailand. Conventionally, FRCC is manufactured from Portland cement, silica sand, cellulose fiber using so-called autoclaved curing under a designate hydrothermal condition to accelerate hydration ...

Abstract The water-cement ratio is one of the key parameters grouting materials, which greatly affects working performance and mechanical properties materials. This paper studies physical properties, such as density, fluidity, consistency, bleeding rate, stone flexural compressive strength micro-cement materials with a 0.8:1, 1:1, 1.5:1 2.0:1 are investigated through variety indoor experiments....

Ultra-High-Performance Concrete (UHPC) is characterized by having an ultra-compact matrix resulting in ultra-high mechanical properties, low permeability to water and gases, improved ductility provided the addition of fibers. The production structures with this type concrete advantageous some situations, especially aggressive environments since it significantly increases durability. However, hi...

Reactive Powder Concrete (RPC) is an ultra high performance concrete which has superior mechanical and physical properties. The RPC is composed of cement and very fine powders such as crushed quartz (100–600 μm) and silica fume with very low water/binder ratio (W/B) (less than 0.20) and Super Plasticizer (SP). The RPC has a very high compressive and tensile strength with better durability prope...

abstract introduction. recently, the ariadent zinc phosphate cement has been introduced to market with low cost. some dentists purchase this product because of low cost and others avoid buying it because of unreliable quality. the two important properties of ideal dental cement are to have the minimum film thickness (less than 25 micron) and to have favorable compressive strength. the purpose o...

cement dust exposure is associated with increased respiratory impairment. as the major occupational hazard in the cement production industry is cement particles, our aim was to more thoroughly examine the acute effects of occupational exposure to cement dust on the respiratory system. a cross-shift study was conducted in a cement factory in iran. 100 high exposed workers from production and pac...

Proponents of the biological theory of aseptic loosening have in recent years tended to concentrate on the production and distribution of particulate ultra-high-molecular-weight polyethylene (UHMWPE) debris around the potential joint space. However, mechanical loading of cemented implants with the differing elastic moduli of metal stems, polymethylmethacrylate (PMMA) cement and bone can result ...

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Background and purpose - Stability and survival of cemented total hip prostheses is dependent on a multitude of factors, including the type of cement that is used. Bone cements vary in viscosity, from low to medium and high. There have been few clinical RSA studies comparing the performance of low- and high-viscosity bone cements. We compared the migration behavior of the Stanmore hip stem ceme...