In this paper, a practical calculation method for long-term deflection of void slabs which was developed for the purpose of weight reduction and improvement of workability was proposed. The calculation method is based...
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This paper reports on long-term loading tests on a voided slab developed to reduce weight and improve workability, where the loading load was such that the tensile steel bars of the slab were at long-term allowable st...
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A large proportion of energy consumption in Japan is attributable to houses, and the influence of household appliances is not negligible. We have surveyed actual conditions of appliance usage in recently-built houses ...
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Gas pressure welding using acetylene gas is a widely used method for rebar jointing in modern construction. However, the increasing production and transportation costs of acetylene gas have made its use less favorable...
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The use of three-dimensional(3D)printed concrete as formwork is becoming more widely applied within the ***,the technology is still not optimized and there are many reports of preliminary cracking during the curing of...
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The use of three-dimensional(3D)printed concrete as formwork is becoming more widely applied within the ***,the technology is still not optimized and there are many reports of preliminary cracking during the curing of cast *** is believed to result from differential shrinkage between the printed and cast *** cracks(in the printed concrete or at the interface between the infill and printed concrete)form a preferential path for aggressive substances and can reduce the durability of the combined concrete *** ensure the desired service life of the structure,it is important that the differential shrinkage between cast and printed concrete is *** study investigated the effect of curing conditions on the differential shrinkage behavior of 3D and cast *** influence of prewetting of the dry-cured 3D printed formwork was also *** the experimental program,a vibrated and self-compacting concrete were used as cast *** 3D printed formwork was produced and combined with cast concrete to simulate a concrete *** formwork was cured for 1,7,or 28 d exposed to the air(relative humidity:60%or 95%)or submerged in *** length change of the combined elements was observed over 56 d after concrete casting and throughout the thickness of the *** show that increasing the curing period in dry conditions of the printed concrete leads to an expansion of the formwork on the first day after *** expansion leads to a non-uniform strain evolution throughout the curing period of the combined *** concrete formwork stored in wet conditions does not expand after the casting process but tends to show a decreasing linear deformation within the whole elements.
The purpose of this study is to develop a daylight device with variable optical properties using near-infrared absorbing reflectors that can provide adequate solar radiation shielding or solar heat utilization during ...
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The study aims to clarify the effect of indoor environments on office workers’ satisfaction with the thermal and air environment. Environmental measurements and questionnaire survey were conducted on 22 office buildi...
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In this study, PIV and wind pressure experiments were carried out under tornado-like wind flow affected by surface roughness. The authors discussed the effects of swirl ratio and roughness density on the velocity fiel...
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A large proportion of energy consumption in Japan is attributable to houses, and that of household appliances is not negligible. However, as the Energy Conservation Act in Japan does not cover household appliances suc...
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The effect of temperature change during curing of polyurethane sealants on the rate of strength development was investigated. Under a constant temperature environment, the curing rate of the sealant was accelerated at...
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