Effect of Crystalline Admixture and Superabsorbent Polymer on Self-Healing and Mechanical Properties of Mortar
In this study, the self-healing properties of mortars mixed with a crystalline admixture (CA) and superabsorbent polymer (SAP) were investigated. By conducting uniaxial compressive strength tests on the mortar samples, the effects of the two admixtures and different admixture ratios on the initial c...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-09-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/17/6040 |
| _version_ | 1797494555884388352 |
|---|---|
| author | Hexiang Wu Xi Chen Yao Liu Shuangxin Li Hongfeng Li |
| author_facet | Hexiang Wu Xi Chen Yao Liu Shuangxin Li Hongfeng Li |
| author_sort | Hexiang Wu |
| collection | DOAJ |
| description | In this study, the self-healing properties of mortars mixed with a crystalline admixture (CA) and superabsorbent polymer (SAP) were investigated. By conducting uniaxial compressive strength tests on the mortar samples, the effects of the two admixtures and different admixture ratios on the initial compressive strength and strength repair ability at different curing ages of the mortar after pre-cracking were investigated. To verify the results, optical microscopy, scanning electron microscopy, and X-ray diffraction were used for microscopic observation of the cracks and their healing products. The results of this study show that CA, which generates dense substances through chemical reactions, has obvious advantages in the self-healing of microcracks and has a greater effect on the flexural strength of mortar compared with SAP, which can effectively fill wider cracks, reduce the width of cracks through physical expansion, and has a greater impact on the compressive strength of mortar compared with CA. Compared with ordinary mortar, mortar mixed with CA only, and mortar mixed with SAP only, the appropriate amounts of both CA and SAP can effectively combine the advantageous effects of CA and SAP and optimise the self-healing effect of mortar so that its self-healing rate reaches 103%. The self-healing filler, consisting mainly of calcium silicate and calcium carbonate, is generated in cracks and enhances the repair strength of the mortar so that the strength of the mortar reaches 46 MPa. |
| first_indexed | 2024-03-10T01:36:00Z |
| format | Article |
| id | doaj.art-ed3c2ad631b141a1a04533c6e766321d |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T01:36:00Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-ed3c2ad631b141a1a04533c6e766321d2023-11-23T13:34:37ZengMDPI AGMaterials1996-19442022-09-011517604010.3390/ma15176040Effect of Crystalline Admixture and Superabsorbent Polymer on Self-Healing and Mechanical Properties of MortarHexiang Wu0Xi Chen1Yao Liu2Shuangxin Li3Hongfeng Li4School of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaIn this study, the self-healing properties of mortars mixed with a crystalline admixture (CA) and superabsorbent polymer (SAP) were investigated. By conducting uniaxial compressive strength tests on the mortar samples, the effects of the two admixtures and different admixture ratios on the initial compressive strength and strength repair ability at different curing ages of the mortar after pre-cracking were investigated. To verify the results, optical microscopy, scanning electron microscopy, and X-ray diffraction were used for microscopic observation of the cracks and their healing products. The results of this study show that CA, which generates dense substances through chemical reactions, has obvious advantages in the self-healing of microcracks and has a greater effect on the flexural strength of mortar compared with SAP, which can effectively fill wider cracks, reduce the width of cracks through physical expansion, and has a greater impact on the compressive strength of mortar compared with CA. Compared with ordinary mortar, mortar mixed with CA only, and mortar mixed with SAP only, the appropriate amounts of both CA and SAP can effectively combine the advantageous effects of CA and SAP and optimise the self-healing effect of mortar so that its self-healing rate reaches 103%. The self-healing filler, consisting mainly of calcium silicate and calcium carbonate, is generated in cracks and enhances the repair strength of the mortar so that the strength of the mortar reaches 46 MPa.https://www.mdpi.com/1996-1944/15/17/6040crystalline admixturesuperabsorbent polymerself-healingstrength recovery |
| spellingShingle | Hexiang Wu Xi Chen Yao Liu Shuangxin Li Hongfeng Li Effect of Crystalline Admixture and Superabsorbent Polymer on Self-Healing and Mechanical Properties of Mortar Materials crystalline admixture superabsorbent polymer self-healing strength recovery |
| title | Effect of Crystalline Admixture and Superabsorbent Polymer on Self-Healing and Mechanical Properties of Mortar |
| title_full | Effect of Crystalline Admixture and Superabsorbent Polymer on Self-Healing and Mechanical Properties of Mortar |
| title_fullStr | Effect of Crystalline Admixture and Superabsorbent Polymer on Self-Healing and Mechanical Properties of Mortar |
| title_full_unstemmed | Effect of Crystalline Admixture and Superabsorbent Polymer on Self-Healing and Mechanical Properties of Mortar |
| title_short | Effect of Crystalline Admixture and Superabsorbent Polymer on Self-Healing and Mechanical Properties of Mortar |
| title_sort | effect of crystalline admixture and superabsorbent polymer on self healing and mechanical properties of mortar |
| topic | crystalline admixture superabsorbent polymer self-healing strength recovery |
| url | https://www.mdpi.com/1996-1944/15/17/6040 |
| work_keys_str_mv | AT hexiangwu effectofcrystallineadmixtureandsuperabsorbentpolymeronselfhealingandmechanicalpropertiesofmortar AT xichen effectofcrystallineadmixtureandsuperabsorbentpolymeronselfhealingandmechanicalpropertiesofmortar AT yaoliu effectofcrystallineadmixtureandsuperabsorbentpolymeronselfhealingandmechanicalpropertiesofmortar AT shuangxinli effectofcrystallineadmixtureandsuperabsorbentpolymeronselfhealingandmechanicalpropertiesofmortar AT hongfengli effectofcrystallineadmixtureandsuperabsorbentpolymeronselfhealingandmechanicalpropertiesofmortar |