Shrinkage behavior of a geopolymer cement paste prepared from pumice-type natural pozzolan was studiedby changing parameters of chemical composition including SiO2/Na2O molar ratio of activator and total molar ratiosof Na2O/Al2O3, and H2O/Al2O3. For investigating the effect of curing conditions on shrinkage, hydrothermal curingwas also applied. The obtained results clearly revealed the governin...

The purpose of this study is to evaluate the long-term vertical deformations of segmented pre-tensioned concrete bridges by a new approach. It provides a practical and reliable method for calculating the amount of long-term deformation based on creep and shrinkage in segmented prestress bridges. There are various relationships for estimating the creep and shrinkage of concrete. The analytical r...

Objective: Potato is the fourth important food crop after wheat, rice and maize. Shrinkage  of  food  materials  has  a negative  consequence  on  the  quality  of  the dehydrated product. The main objective pursued in this paper is to investigate the shrinkage amount of potato slices during drying process using vacuum-infrared method. Methods: In this work, the effect of the infrared radiation...

Department of Dermatology, Rajarajeswari Medical College and Hospital, Bengaluru, Karnataka, India A 40‐year‐old female patient born to a second‐degree consanguineous marriage presented to us with complaints of premature graying of hair and diffuse loss of hair over the scalp, eyelashes, and eyebrows since 3 years. There was history of developing multiple depigmented and hyperpigmented macules ...

Concretes are designed to fulfill specific engineering requirements, commonly exemplified by slump, unit weight, and compressive strength. One source of untapped potential for varying engineering properties of hardened concrete is the variation of the cement particle size distribution. In this study, the performance of cements prepared by blending a coarse ASTM C150 Type I/II and a fine Type II...

background and aims. despite the increasing demand for adhesive restorations in pediatric dentistry, polymerization shrinkage and subsequent marginal microleakage remains a problem. the aim of this study was to evaluate of the sealing ability of novel low-shrinkage composite silorane in class v cavity of primary canines in comparison with three types of composite resin. materials and methods. n...

In a light microscopic study of the macula of 104 human eyes obtained at necropsy of patients aged 3 to 96 we found: (1) Displacement of nuclei from the outer nuclear layer into the outer plexiform layer occurred in small numbers early in life and markedly increased after age 30. (2) Displacement of nuclei from the outer nuclear layer to the layer of rods and cones was rare in early life but in...

Repair materials have been developed in this research by adding micro-synthetic fibers cement-based mortar. In addition, accelerator is incorporated the mortar to obtain high early strength of repair materials. Their shrinkage behavior interest. This study aims determine fiber-reinforced and propose models reflect their behavior. The results show that rapid developments are observed at an age w...

Article is devoted to the investigation of suitability low carbon Roman cement for restoration and finishing works. The history development as a natural hydraulic binder, which was commonly used decorate building facades in 19th early 20th centuries, presented. properties mortars based on make it an excellent product architectural conservation, they are characterized by fast setting, high poros...