Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of steel fibers on the durability properties of sand concrete with barley straws
https://orcid.org/0000-0001-9769-6726
Highlights Steel fibers were incorporated alongside barley straws in sand concrete. The porosity of sand concrete and consequently its depth carbonation were clearly reduced. “Freeze–Thaw” and “Wetting–Drying” did not significantly affect the studied composite. BSPT-FM1% seems to constitute the best compromise. Observation, SEM and XRD analysis showed surface deteriorations due to HCl acid.
Abstract The work carried out within the framework of this paper is a contribution aiming to better appreciate the effects of lignocellulosic – steel hybrid fibers on the durability properties of sand concrete. The work is mainly focused on the study of the effect of the simultaneous addition of steel fibers and barley straw (treated with hot water) on the behavior of sand concrete with regard to severe climatic and environmental conditions. On the basis of previous work results, the proportion of barley straws is fixed at 15 kg/m3, while that of steel fibers varies from 0 to 2% by a step of 0.5%. Several durability tests have been considered: accelerated carbonation, capillary water absorption, porosity accessible to water, “freeze–thaw” test, the “wetting–drying” test and resistance to hydrochloric acid (2% HCl). The obtained results showed that the carbonation depth decreases as the proportion of steel fibers increases in the sand concrete: the rate of reduction reached about 41%. Moreover, the addition of steel fibers to the studied lightweight sand concrete reduces both the mass gain of the carbonated concretes and the value of porosity accessible to water. In addition and as expected, the tests of the “freeze–thaw” and “wetting–drying” cycles led to a slight decrease in the compressive strength for all the studied compositions; it should be noted that BSPT-FM1% gave the best result. Finally, the visual examination of the concretes subjected hydrochloric acid (HCl) attack, showed that all of the studied concretes present progressive degradations, depending on the immersion time. However, it should be noted that the presence of steel fibers increased the mass variation, in comparison with concrete containing only barley straws (BSPT-SFM). These results, were afterwards, confirmed by the SEM and XRD analysis. The latter clearly demonstrated the deterioration of the samples surfaces caused by the acid attack.
Effect of steel fibers on the durability properties of sand concrete with barley straws
https://orcid.org/0000-0001-9769-6726
Highlights Steel fibers were incorporated alongside barley straws in sand concrete. The porosity of sand concrete and consequently its depth carbonation were clearly reduced. “Freeze–Thaw” and “Wetting–Drying” did not significantly affect the studied composite. BSPT-FM1% seems to constitute the best compromise. Observation, SEM and XRD analysis showed surface deteriorations due to HCl acid.
Abstract The work carried out within the framework of this paper is a contribution aiming to better appreciate the effects of lignocellulosic – steel hybrid fibers on the durability properties of sand concrete. The work is mainly focused on the study of the effect of the simultaneous addition of steel fibers and barley straw (treated with hot water) on the behavior of sand concrete with regard to severe climatic and environmental conditions. On the basis of previous work results, the proportion of barley straws is fixed at 15 kg/m3, while that of steel fibers varies from 0 to 2% by a step of 0.5%. Several durability tests have been considered: accelerated carbonation, capillary water absorption, porosity accessible to water, “freeze–thaw” test, the “wetting–drying” test and resistance to hydrochloric acid (2% HCl). The obtained results showed that the carbonation depth decreases as the proportion of steel fibers increases in the sand concrete: the rate of reduction reached about 41%. Moreover, the addition of steel fibers to the studied lightweight sand concrete reduces both the mass gain of the carbonated concretes and the value of porosity accessible to water. In addition and as expected, the tests of the “freeze–thaw” and “wetting–drying” cycles led to a slight decrease in the compressive strength for all the studied compositions; it should be noted that BSPT-FM1% gave the best result. Finally, the visual examination of the concretes subjected hydrochloric acid (HCl) attack, showed that all of the studied concretes present progressive degradations, depending on the immersion time. However, it should be noted that the presence of steel fibers increased the mass variation, in comparison with concrete containing only barley straws (BSPT-SFM). These results, were afterwards, confirmed by the SEM and XRD analysis. The latter clearly demonstrated the deterioration of the samples surfaces caused by the acid attack.
Effect of steel fibers on the durability properties of sand concrete with barley straws
https://orcid.org/0000-0001-9769-6726
Highlights Steel fibers were incorporated alongside barley straws in sand concrete. The porosity of sand concrete and consequently its depth carbonation were clearly reduced. “Freeze–Thaw” and “Wetting–Drying” did not significantly affect the studied composite. BSPT-FM1% seems to constitute the best compromise. Observation, SEM and XRD analysis showed surface deteriorations due to HCl acid.
Abstract The work carried out within the framework of this paper is a contribution aiming to better appreciate the effects of lignocellulosic – steel hybrid fibers on the durability properties of sand concrete. The work is mainly focused on the study of the effect of the simultaneous addition of steel fibers and barley straw (treated with hot water) on the behavior of sand concrete with regard to severe climatic and environmental conditions. On the basis of previous work results, the proportion of barley straws is fixed at 15 kg/m3, while that of steel fibers varies from 0 to 2% by a step of 0.5%. Several durability tests have been considered: accelerated carbonation, capillary water absorption, porosity accessible to water, “freeze–thaw” test, the “wetting–drying” test and resistance to hydrochloric acid (2% HCl). The obtained results showed that the carbonation depth decreases as the proportion of steel fibers increases in the sand concrete: the rate of reduction reached about 41%. Moreover, the addition of steel fibers to the studied lightweight sand concrete reduces both the mass gain of the carbonated concretes and the value of porosity accessible to water. In addition and as expected, the tests of the “freeze–thaw” and “wetting–drying” cycles led to a slight decrease in the compressive strength for all the studied compositions; it should be noted that BSPT-FM1% gave the best result. Finally, the visual examination of the concretes subjected hydrochloric acid (HCl) attack, showed that all of the studied concretes present progressive degradations, depending on the immersion time. However, it should be noted that the presence of steel fibers increased the mass variation, in comparison with concrete containing only barley straws (BSPT-SFM). These results, were afterwards, confirmed by the SEM and XRD analysis. The latter clearly demonstrated the deterioration of the samples surfaces caused by the acid attack.
Effect of steel fibers on the durability properties of sand concrete with barley straws
Ammari, M.S. (Autor:in) / Bederina, M. (Autor:in) / Belhadj, B. (Autor:in) / Merrah, A. (Autor:in)
19.08.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2016
| British Library Online Contents | 2016
| British Library Online Contents | 2016