Evaluation of Sealed Joint Performance for the Selection of Sealants Suitable for Use in Autoclaved Lightweight Concrete Panels

Author(s):  
Hiroyuki Miyauchi ◽  
Michael A. Lacasse ◽  
Shigeki Murata ◽  
Noriyoshi Enomoto ◽  
Kyoji Tanaka
2012 ◽  
Vol 9 (1) ◽  
pp. 104064
Author(s):  
Hiroyuki Miyauchi ◽  
Michael A. Lacasse ◽  
Shigeki Murata ◽  
Noriyoshi Enomoto ◽  
Kyoji Tanaka ◽  
...  

2011 ◽  
Vol 261-263 ◽  
pp. 783-787 ◽  
Author(s):  
Soon Ching Ng ◽  
Kaw Sai Low ◽  
Ngee Heng Tioh

Roof and wall are known to be responsible for heat entering into a building and should therefore be thermally insulated in order to lessen energy consumption required for air-conditioning. In this study, four soil-based aerated lightweight concrete (ALC) panels each measures 750 mm (length) x 750 mm (breadth) x 70 mm (thick) with different aerial intensity of newspaper membrane encased were produced and tested on their thermal insulation property. For environmental friendly and economy reasons, clayey soil was used in place of sand to produce the ALC panels and they were tested in the Thermal Laboratory for twenty hours. Temperature gradient was computed based on the surface temperature measured during the test. The results obtained indicated that newspaper membrane encased soil-based ALC panels have superior heat insulation performance compared to control panel in terms of temperature gradient. It is found that the temperature gradient increased from 1.92 °C/cm to 2.08 °C/cm or 8.3% higher than control panel with just merely 0.05 g/cm2 of newspaper membrane encased.


2020 ◽  
Vol 6 (9) ◽  
pp. 73018-73029
Author(s):  
Alexandre Nascimento de Lima ◽  
Lucas Oliveira Correia Silva ◽  
Mateus da Silva Santos ◽  
Alysson de Lima Lessa ◽  
Paulo César Correia Gomes

2014 ◽  
Vol 501-504 ◽  
pp. 551-554
Author(s):  
Xin Tang Wang ◽  
Zheng Jue Huang ◽  
Bing Shao

For study of mechanical performance and bearing mechanism of the fabricated composite floor consisting of thin-walled steel beams and lightweight aggregate concrete panels, the static load experiment of a composite floor was finished and presented. The specimen is simply supported at the two shorter sides and the other two longer sides free. The equivalent uniform loads are applied to the floor through setting the load blocks on the supper surface of the floor. The vertical displacements and strains of the specimen were measured and analyzed. The experimental results show that the new composite floor has greater bearing capacity and better elasticity. It is concluded that although there is combined action between the main beam and the concrete panel, there is also evident slip between top flange of the main beam and the concrete panel.


2009 ◽  
Vol 15 (3) ◽  
pp. 317-324 ◽  
Author(s):  
Romualdas Mačiulaitis ◽  
Marija Vaičienė ◽  
Ramunė Žurauskienė

The properties of the hardened concrete depend on the selected raw materials: size and amount of the particles of coarse aggregate, as well as on the ratio of other components. Particular countries use various methodologies for the selection of concrete composition to select the components of the concrete mixture. However, the properties of the concrete, selected by using any methodology for the selection of the concrete composition and hardened by following the defined conditions, must satisfy the values of certain necessary characteristics. The results of the implemented research indicate that the most optimal solution is to use the coarse aggregate of multi‐fractional or discontinuous fractional composition. The optimal composition of the concrete must be selected to ensure that the binding material is not overdosed. Yet, all components must be selected in such a way, that the required properties of the final product are retained after concrete mixture hardens. When catalyst waste materials from the reactor of the catalytic cracking (15%) are used for the lightweight concrete, the density of the expanded‐clay lightweight concrete investigated and compressive strength increases even for the higher water/cement ratio, more heat is dissipated during the hydration of the cement and this exothermic effect occurs several hours earlier. Santrauka Sukietėjusio betono savybės priklauso nuo betonui parinktų žaliavų: stambaus užpildo dalelių dydžio ir jų kiekio, taip pat nuo kitų sudedamųjų dalių santykio. Betono mišinio sudedamąsias dalis šalys parenka įvairiais betono sudėties parinkimo metodais, tačiau pagal bet kurį betono sudėties parinkimo metodą parinkto ir pagal nustatytas sąlygas sukietinto betono savybės turi tenkinti tam tikrų būtinųjų charakteristikų vertes. Darbe atliktų tyrimų rezultatai parodė, kad optimaliu naudoti daugiafrakcį arba trūkiosios frakcinės sudėties stambųjį užpildą. Betono sudėtis turi būti parinkta nepereikvojant rišamosios medžiagos, tačiau visas sudedamąsias dalis parenkant taip, kad, sukietėjus betono mišiniui, išliktų reikiamos galutinio produkto savybės. Lengviesiems betonams naudojant katalizatoriaus atlieką iš katalitinio krekingo reaktoriaus (15 %), padidėja tiriamojo keramzitbetonio tankis, gniuždomasis stipris net esant didesniam V/C santykiui, o hidratuojantis cementui, išsiskiria daugiau šilumos, ir šis egzoterminis efektas įvyksta keliomis valandomis anksčiau.


2014 ◽  
Vol 501-504 ◽  
pp. 559-562
Author(s):  
Zheng Jue Huang ◽  
Bing Shao ◽  
Xin Tang Wang

For analysis of mechanical property and bearing mechanism of the composite floor consisting of cold-formed thin-walled steel beams and lightweight aggregate concrete panels, the static load test of a composite floor was presented. The floor specimen is simply supported at the two shorter sides of it and the other two sides free. The equivalent uniform loads are applied to the floor through piling up the load blocks on the supper surface of the floor. The displacements of the floor and strains of specimens were measured and analyzed. It is denoted that the vertical displacements of the floor varied linearly with the load while it is less than 8kN, but the slips of main beam and concrete panel vary nonlinearly during the whole loading process. It was seen that there were not evident cracks in the concrete panels while the applied loads are much larger than the normal loads.


2018 ◽  
Vol 7 (4.20) ◽  
pp. 438
Author(s):  
Taif A. Abdulkareem ◽  
Ashraf A. Alfeehan

The ribbed slabs provide a lighter and stiffer slab than an equivalent traditional slab with minimizing the total volume of the materials. Four one-way lightweight concrete panels, including one flat and three ribbed panels were cast and tested under two-point load as simply supported up to the failure. The main investigated variable is a ratio of the rib depth (d) to the overall beam depth (h). All the panels have the same concrete volume and the same steel reinforcement ratio. Also, the width of the rib is equal to the slab thickness as a constraint condition in all the panels. Data were recorded at the loading stages to determine the load capacity and the deflection. A nonlinear finite element analysis carried out by using ANSYS-15 software program to analyze the panels and to verify the results. Increase the (d/h) ratio improved the structural behavior by increase the carrying load capacity and reduces the deflection to a certain limit. Compatibility results have been obtained between the numerical and experimental work.   


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