نتایج جستجو برای: workability
تعداد نتایج: 1616 فیلتر نتایج به سال:
BACKGROUND The Normalization Process Model is a conceptual tool intended to assist in understanding the factors that affect implementation processes in clinical trials and other evaluations of complex interventions. It focuses on the ways that the implementation of complex interventions is shaped by problems of workability and integration. METHOD In this paper the model is applied to two diff...
Clay brick and granite waste are part of the generated by construction demolition activities. The amount these wastes is enormous, but on one hand, they can be used as a raw material for cement mixtures; thus, it important to find ways utilize them efficiently. In this study, clay were crushed screened into two size fractions (0.15–2.36 mm sand replacement smaller than 0.15 replacement), total ...
This study presents the performance of quarry rock dust (QRD) incorporated fly ash (FA) and slag (SG) based geopolymer concretes (QFS-GPC) exposed to ambient elevated temperatures. A total five QFS-GPC mix types were prepared. The quantity FA (50%) was kept constant in all mixes, SG replaced by 5%, 10%, 15%, 20% QRD. fresh, hardened properties viz., workability, compressive strength, splitting ...
nano materials have been widely used in laboratory and industrial scales in order to improve various properties of concrete and concrete mixture. the mainstream practice of the researches in this field is to add metallic nano-particles into the concrete mixture. the present research focuses on adding micro-nano air bubbles (mnab) into water before mixing it with aggregate and cement mixtures. i...
Abstract: In recent years, many research works have been done to investigate the possibility of utilizing a broad range of materials as raw materials in the production of geopolymer cements. The use of artificial pozzolans or aluminosilicate-type industrial waste materials such as granulated blast-furnace slag and fly ash has been reported in many research works. Natural pozzolans are also al...
Prediction of the deformation characteristics is an important step to understand the workability of alloys during imposing large strains. In this research, severe plastic deformation of Sn-5Sb solder alloy was carried out under different t deformation conditions, including the temperature range of 298, 330, 36, 400 K and die designs. The current study applies an experimentally validated finite ...
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