The aim of this study was to evaluate the influence of different periodontal therapies on the integrity of indirect restorations by scanning electron microscopy (SEM). Sixty single-rooted bovine teeth were selected and randomly assigned to 12 groups. Inlay cavities were prepared in the cervical region on the center of the cementoenamel junction, and were restored with laboratory processed resin...

Self-consolidating concrete (SCC) has been developed for use in precast prestressed concrete bridge girders in the state of Minnesota. Locally available materials were used with a number of cementitious and filler materials, including ASTM Type III cement, Class C fly ash, and blast furnace slag. SCC was successfully proportioned with both natural river gravels and crushed stone as coarse aggre...

prolonged or repeated exposure to cement dust, depending on the duration, level of exposure and individual sensitivity has health implications on the skin, eyes, respiratory and haematological systems. this study assessed cardiovascular disease risk factors and cardiac markers among cement workers of nigerian origin to determine the effects of duration of exposure to cement dust on these parame...

The purpose of this study was to evaluate the performance of porous vegetation concrete block made from blast furnace slag cement containing industrial by-products such as blast furnace slag aggregate and powder. The blocks were tested for void ratio, compressive strength and freeze-thaw resistance to determine the optimal mixing ratio for the porous vegetation block. An economic analysis of th...

The National Center f’or Asphalt Trchnolofiy (NCAT) has just complctd two Nation;ll Coopwrrive HicThw:tv Rr<e:lrch Pq!ram (NtHR6) Projects: NCHRP 9-X. “Designing Stone Matrix Asphalt (SMA) Mixtures.” and NCHRP 9-9. “Reilnement of Superpave Gyratory Compaction Procedure.” Dr. Ray Brown. NCAT director. was the p r i n c i p a l invcsti:etor on both pmjects. The fint project on SMA represented ;I ...

Different types of natural coarse aggregate are available in the local market Bangladesh, which primarily imported from several regions neighboring country, India. This paper aims to find best locally for concrete preparation terms mechanical strength. It also reports on results an experiment investigation that looked at effects six different aggregate, namely Burimari, Bhurungamari, Bholaganj,...

Abstract In the execution of foundation layers and road base it is necessary to reduce costs their construction by using local materials (ballast or crushed stone). some cases, physical-mechanical characteristics do not satisfy conditions for dimensioning structure. Therefore, improve these characteristics, they are stabilized with hydraulic binders (fly ash various mixtures based on lime cemen...

The article presents the peculiarities of obtaining superplasticized cementitious systems "Portland cement – fly ash - superplasticizer" to find a rational provision given construction and technical properties concrete. It was studied physico-chemical hydration processes systems. There were solved problems directional formation microstructure stone. Research results show that use allows influen...

The properties of concrete with complex chemical additives to improve the technology for production sleepers from prestressed are discussed in article. With use under heat-moisture processing, at a temperature 40°C, there was no decrease strength cement stone and sufficient initial stage curing period, 44.7 MPa; determined addition Glenium 27 S - 1.0% hardening accelerator Master X -Seed 100 1....