introduction: ferric sulfate pulpotomy is a safe and effective method of the pulpotomy of primary teeth. but the results of different studies indicate low success rate of ferric sulfate pulpotomy in comparison to formocresol pulpotomy and a portion of these failures may be related to stimulating and harmful effects of zinc oxide eugenol paste. the aim of this study was to determine and compare ...

The growing demand for high strength concrete [HSC] in the construction industry increases usage of cement, resulting environmental issues. Recent studies are showing that utilization cementitious materials can effectively reduce volume cement. In present study, ternary blended combinations were prepared using silica fume, and fly ash to attain HSC. Here, cement was partially replaced by fume [...

Actual concrete mixtures and casting processes do not enable on-demand real-time adjustment of the rheology fresh concrete, forcing operators to passively rely on intrinsic evolution material properties during processing. Newly-developed functional polymers responsive external electromagnetic trigger signals can be used as chemical admixtures in cementitious materials active control (ARC) stiff...

Polycarboxylate-type green surfactants with either sulfide- (S-) or imino- (N-) linkages were prepared in high yields by a single addition reaction of fatty mercaptan or fatty amine with unsaturated polycarboxylic acids such as fumaric, maleic, itaconic and aconitic acids. They exhibited surfactant properties and excellent biodegradabilities. Also, green surfactants with S-linkages showed bette...

Blended cements appear as the most promising way to massively produce with reduced environmental footprints. However, considering generally lower early mechanical performance of highly blended cements, chemical admixtures are increasingly relied upon increase strength. in many cases this can negatively impact other properties rheology and durability. This paper proposes an approach formulate lo...

Concrete is a binding material, made up of constituent cement, fine aggregate, coarse aggregate and water. Self-Compacting an innovative concrete that does not require vibration for placing compaction. It able to flow under its own weight, completely filling formwork achieving full compaction, even in the presence congested reinforcement. The study also intended quantify amount plantain leaf as...

Methacrylic acid-co-poly(ethylene glycol methacrylate) (MAA-co-PEGMA) copolymers (MPEG-type polycarboxylate ether (PCE) superplasticizers) are characterized by a comb-like structure. Although they have been used for years as dispersants in cementitious formulations, their structure–property relationship is still not fully understood. In this work, PCEs with uniform composition and different cha...

The electrical properties of carbon nanotubes (CNT) cement-based composites have been modeled in previous works by circuit models or homogenization theories. An alternative approach is the use an effective medium theory with induced polarization: In this work, a new model based on generalized polarization (GEMTIP) cylindrical inclusions proposed. presented results and discussion show its applic...