Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Performance Evaluation of Pre-foamed Ultra-lightweight Composites Incorporating Various Proportions of Slag
This research examines the feasibility of using a mixture of cement, fly ash, ground granulated blast-furnace slag, and river sand to manufacture pre-foamed ultra-lightweight composite (PULC). Four PULC specimens were prepared with the substitution ofcement by slag at 0, 10, 20, and 30 % by weight. The engineering properties of PULC samples were evaluated through the tests ofcompressive strength, dry density, water absorption, drying shrinkage, and thermal conductivity. Besides, numerical simulation of heat transfer through the PULC brick wall and the microstructure observation were performed. The performance of PULC mixtures incorporating slag showed higher effectiveness than merely used cement. The substitution of 20 % cement by slag resulted in the highest compressive strength as well as the lowest value of water absorption of the PULC samples. Also, the efficiency of the thermal conductivity was in inverse proportion with the density of PULC specimens and it was right for water absorption and drying shrinkage. Moreover, numerical simulations showed that the temperature distribution values in the wall made by PULC material were smaller than in the wall made by the normal clay brick in the same position. Besides, the microstructure analysis revealed that the existence of slag generated a more dense structure of PULC samples with the addition of calcium-silicate-hydrate (C-S-H) gel, especially for amix containing 20 % slag. Thus, the results of this study further demonstrated that a 20 % slag was the optimal content for the good engineering properties of the PULC samples.
Performance Evaluation of Pre-foamed Ultra-lightweight Composites Incorporating Various Proportions of Slag
This research examines the feasibility of using a mixture of cement, fly ash, ground granulated blast-furnace slag, and river sand to manufacture pre-foamed ultra-lightweight composite (PULC). Four PULC specimens were prepared with the substitution ofcement by slag at 0, 10, 20, and 30 % by weight. The engineering properties of PULC samples were evaluated through the tests ofcompressive strength, dry density, water absorption, drying shrinkage, and thermal conductivity. Besides, numerical simulation of heat transfer through the PULC brick wall and the microstructure observation were performed. The performance of PULC mixtures incorporating slag showed higher effectiveness than merely used cement. The substitution of 20 % cement by slag resulted in the highest compressive strength as well as the lowest value of water absorption of the PULC samples. Also, the efficiency of the thermal conductivity was in inverse proportion with the density of PULC specimens and it was right for water absorption and drying shrinkage. Moreover, numerical simulations showed that the temperature distribution values in the wall made by PULC material were smaller than in the wall made by the normal clay brick in the same position. Besides, the microstructure analysis revealed that the existence of slag generated a more dense structure of PULC samples with the addition of calcium-silicate-hydrate (C-S-H) gel, especially for amix containing 20 % slag. Thus, the results of this study further demonstrated that a 20 % slag was the optimal content for the good engineering properties of the PULC samples.
Performance Evaluation of Pre-foamed Ultra-lightweight Composites Incorporating Various Proportions of Slag
Huynh, Trong-Phuoc (Autor:in) / Pham, Van-Hien (Autor:in) / Do, Ngoc-Duy (Autor:in) / Nguyen, Trong-Chuc (Autor:in) / Ho, Nguyen-Trong (Autor:in)
09.11.2020
doi:10.3311/PPci.16996
Periodica Polytechnica Civil Engineering; Vol. 65 No. 1 (2021); 276-286 ; 1587-3773 ; 0553-6626
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
690
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