Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Self-healing of glass fibre reinforced concrete (GRC) and polymer glass fibre reinforced concrete (PGRC) using crystalline admixtures
Highlights PGRC have higher LOP and MOR values comparing to GRC samples. Added polymer to PGRC samples makes brittle concrete more flexible and prone to deformations. For all samples with admixtures and reference samples maximal healed crack width is from 134,7–308,7 µm. Healing rate during first 8 weeks after pre-cracking for GRC and PGRC is from 7 till 19 µm per week. Main self-heling products of GRC and PGRC with and without crystalline admixtures are CaCO3 and CSH gel.
Abstract In this study glass fibre reinforced concrete (GRC) with and without polymer was used as base material to evaluate concrete self-healing enhanced by crystalline admixture. GRC was used because of fibre reinforcement which allow to control width of crack during sample pre-cracking. Properties, like flexural strength, volumetric weight, water absorption and open porosity of GRC and PGRC were evaluated. XRD and FTIR were used to investigate crystalline admixtures produced by different manufacturers. Crystalline admixtures were added 1% from cement. Samples were pre-cracked after 28 days. After pre-cracking samples were fully immersed in water during healing process. Analysis of GRC and PGRC sample self-healing was made. Crack healing rate was monitored for 8 weeks for samples with crystalline admixture, which achieved the best results in crack healing. Results showed difference in self-heling start between GRC and PGRC samples.
Self-healing of glass fibre reinforced concrete (GRC) and polymer glass fibre reinforced concrete (PGRC) using crystalline admixtures
Highlights PGRC have higher LOP and MOR values comparing to GRC samples. Added polymer to PGRC samples makes brittle concrete more flexible and prone to deformations. For all samples with admixtures and reference samples maximal healed crack width is from 134,7–308,7 µm. Healing rate during first 8 weeks after pre-cracking for GRC and PGRC is from 7 till 19 µm per week. Main self-heling products of GRC and PGRC with and without crystalline admixtures are CaCO3 and CSH gel.
Abstract In this study glass fibre reinforced concrete (GRC) with and without polymer was used as base material to evaluate concrete self-healing enhanced by crystalline admixture. GRC was used because of fibre reinforcement which allow to control width of crack during sample pre-cracking. Properties, like flexural strength, volumetric weight, water absorption and open porosity of GRC and PGRC were evaluated. XRD and FTIR were used to investigate crystalline admixtures produced by different manufacturers. Crystalline admixtures were added 1% from cement. Samples were pre-cracked after 28 days. After pre-cracking samples were fully immersed in water during healing process. Analysis of GRC and PGRC sample self-healing was made. Crack healing rate was monitored for 8 weeks for samples with crystalline admixture, which achieved the best results in crack healing. Results showed difference in self-heling start between GRC and PGRC samples.
Self-healing of glass fibre reinforced concrete (GRC) and polymer glass fibre reinforced concrete (PGRC) using crystalline admixtures
Guzlena, S. (Autor:in) / Sakale, G. (Autor:in)
13.09.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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