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Self-healing behavior of high-strength strain-hardening cement-based composites (HS-SHCC) blended with limestone calcined clay cement (LC3)
https://orcid.org/0000-0002-0336-7241
https://orcid.org/0000-0003-3030-1317
Highlights: Higher moisture is favorable for self-healing behaviors of both HS-SHCC. New-formed hydration products are not sufficient to provide comparable mechanical properties for HS-SHCC. LC3 HS-SHCC behaves relatively high self-healing performance after freeze–thaw cycles.
Abstract Self-healing is an important characteristic of cement-based composites, which is highly related to the safety and service life of construction materials under load and variable environmental conditions. This study investigated the self-healing behavior of ordinary Portland cement- (as Ref) and Limestone Calcined Clay Cement (LC3)-based high-strength, strain-hardening cement-based composites (HS-SHCC) under different exposure conditions. Experimental results showed that wet-dry cycles were favorable for crack healing in both Ref and LC3 HS-SHCC due to the abundant moisture for cement rehydration. However, the new-formed hydration products were weak and fiber bridging in HS-SHCC was not re-built. Thus, the healed pre-cracks were easy to crack again during re-loading. Between Ref and LC3 HS-SHCC, Ref composites showed a favorable self-healing behavior in terms of flexural strength improvement after wet-dry cycles, whereas LC3 composites presented desirable self-healing performance after freeze–thaw cycles due to the discrepancy in reaction products and microstructure. In summary, Ref and LC3 HS-SHCC presented desirable but different self-healing performances under various exposure conditions.
Self-healing behavior of high-strength strain-hardening cement-based composites (HS-SHCC) blended with limestone calcined clay cement (LC3)
https://orcid.org/0000-0002-0336-7241
https://orcid.org/0000-0003-3030-1317
Highlights: Higher moisture is favorable for self-healing behaviors of both HS-SHCC. New-formed hydration products are not sufficient to provide comparable mechanical properties for HS-SHCC. LC3 HS-SHCC behaves relatively high self-healing performance after freeze–thaw cycles.
Abstract Self-healing is an important characteristic of cement-based composites, which is highly related to the safety and service life of construction materials under load and variable environmental conditions. This study investigated the self-healing behavior of ordinary Portland cement- (as Ref) and Limestone Calcined Clay Cement (LC3)-based high-strength, strain-hardening cement-based composites (HS-SHCC) under different exposure conditions. Experimental results showed that wet-dry cycles were favorable for crack healing in both Ref and LC3 HS-SHCC due to the abundant moisture for cement rehydration. However, the new-formed hydration products were weak and fiber bridging in HS-SHCC was not re-built. Thus, the healed pre-cracks were easy to crack again during re-loading. Between Ref and LC3 HS-SHCC, Ref composites showed a favorable self-healing behavior in terms of flexural strength improvement after wet-dry cycles, whereas LC3 composites presented desirable self-healing performance after freeze–thaw cycles due to the discrepancy in reaction products and microstructure. In summary, Ref and LC3 HS-SHCC presented desirable but different self-healing performances under various exposure conditions.
Self-healing behavior of high-strength strain-hardening cement-based composites (HS-SHCC) blended with limestone calcined clay cement (LC3)
https://orcid.org/0000-0002-0336-7241
https://orcid.org/0000-0003-3030-1317
Highlights: Higher moisture is favorable for self-healing behaviors of both HS-SHCC. New-formed hydration products are not sufficient to provide comparable mechanical properties for HS-SHCC. LC3 HS-SHCC behaves relatively high self-healing performance after freeze–thaw cycles.
Abstract Self-healing is an important characteristic of cement-based composites, which is highly related to the safety and service life of construction materials under load and variable environmental conditions. This study investigated the self-healing behavior of ordinary Portland cement- (as Ref) and Limestone Calcined Clay Cement (LC3)-based high-strength, strain-hardening cement-based composites (HS-SHCC) under different exposure conditions. Experimental results showed that wet-dry cycles were favorable for crack healing in both Ref and LC3 HS-SHCC due to the abundant moisture for cement rehydration. However, the new-formed hydration products were weak and fiber bridging in HS-SHCC was not re-built. Thus, the healed pre-cracks were easy to crack again during re-loading. Between Ref and LC3 HS-SHCC, Ref composites showed a favorable self-healing behavior in terms of flexural strength improvement after wet-dry cycles, whereas LC3 composites presented desirable self-healing performance after freeze–thaw cycles due to the discrepancy in reaction products and microstructure. In summary, Ref and LC3 HS-SHCC presented desirable but different self-healing performances under various exposure conditions.
Self-healing behavior of high-strength strain-hardening cement-based composites (HS-SHCC) blended with limestone calcined clay cement (LC3)
Wang, Lei (author) / Zhu, Zhou (author) / Hamza Ahmed, Ameer (author) / Liebscher, Marco (author) / Zhu, Xiaohong (author) / Mechtcherine, Viktor (author)
2023-02-02
Article (Journal)
Electronic Resource
English
Durability of strain-hardening cement-based composites (SHCC)
| British Library Online Contents | 2012
Durability of strain-hardening cement-based composites (SHCC)
| Online Contents | 2012