Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of Concrete
Fundamental properties of magnesium phosphate cement (MPC) were investigated in this paper. The setting time and compressive and bond (i.e., flexural and tensile bond) strengths were measured to assess the applicability, and hydration product was detected by the X-ray diffraction. The specimens were...
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/7179403 |
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| author | Joon Woo Park Ki Hwan Kim Ki Yong Ann |
| author_facet | Joon Woo Park Ki Hwan Kim Ki Yong Ann |
| author_sort | Joon Woo Park |
| collection | DOAJ |
| description | Fundamental properties of magnesium phosphate cement (MPC) were investigated in this paper. The setting time and compressive and bond (i.e., flexural and tensile bond) strengths were measured to assess the applicability, and hydration product was detected by the X-ray diffraction. The specimens were manufactured with magnesia and potassium dihydrogen phosphate (K2HPO4) was added to activate hydration process. The Borax (Na2B4O7·10H2O) was used as a retarder to mitigate overwhelming rapid hardening. Mercury intrusion porosimetry was used to examine the pore structure of MPC mortar, and simultaneously rapid chloride penetration test was performed. As a result, the compressive strength of MPC mortar was mostly achieved within 12 hours; in particular, the MPC mortar at 4.0 of M/P ranked the highest value accounting for 30.0 MPa. When it comes to tensile and flexural bond to old substrate in mortar patching, the MPS had the higher tensile and flexural strengths, accounting for 1.9 and 1.7 MPa, respectively, compared to OPC mortar patching. Unlike Portland cement mortar, the MPC mortar contained mainly air void rather than capillary pores in the pore distribution. Presumably due to reduced capillary pore in the MPC, the MPC indicated lower penetrability in the chloride penetration test. |
| format | Article |
| id | doaj-art-f81009173abb4ec8b1a9145b0af213e4 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-f81009173abb4ec8b1a9145b0af213e42025-02-03T01:10:34ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/71794037179403Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of ConcreteJoon Woo Park0Ki Hwan Kim1Ki Yong Ann2Department of Civil and Environmental Engineering, Hanyang University, Ansan 15588, Republic of KoreaDepartment of Civil and Environmental Engineering, Hanyang University, Ansan 15588, Republic of KoreaDepartment of Civil and Environmental Engineering, Hanyang University, Ansan 15588, Republic of KoreaFundamental properties of magnesium phosphate cement (MPC) were investigated in this paper. The setting time and compressive and bond (i.e., flexural and tensile bond) strengths were measured to assess the applicability, and hydration product was detected by the X-ray diffraction. The specimens were manufactured with magnesia and potassium dihydrogen phosphate (K2HPO4) was added to activate hydration process. The Borax (Na2B4O7·10H2O) was used as a retarder to mitigate overwhelming rapid hardening. Mercury intrusion porosimetry was used to examine the pore structure of MPC mortar, and simultaneously rapid chloride penetration test was performed. As a result, the compressive strength of MPC mortar was mostly achieved within 12 hours; in particular, the MPC mortar at 4.0 of M/P ranked the highest value accounting for 30.0 MPa. When it comes to tensile and flexural bond to old substrate in mortar patching, the MPS had the higher tensile and flexural strengths, accounting for 1.9 and 1.7 MPa, respectively, compared to OPC mortar patching. Unlike Portland cement mortar, the MPC mortar contained mainly air void rather than capillary pores in the pore distribution. Presumably due to reduced capillary pore in the MPC, the MPC indicated lower penetrability in the chloride penetration test.http://dx.doi.org/10.1155/2016/7179403 |
| spellingShingle | Joon Woo Park Ki Hwan Kim Ki Yong Ann Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of Concrete Advances in Materials Science and Engineering |
| title | Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of Concrete |
| title_full | Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of Concrete |
| title_fullStr | Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of Concrete |
| title_full_unstemmed | Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of Concrete |
| title_short | Fundamental Properties of Magnesium Phosphate Cement Mortar for Rapid Repair of Concrete |
| title_sort | fundamental properties of magnesium phosphate cement mortar for rapid repair of concrete |
| url | http://dx.doi.org/10.1155/2016/7179403 |
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