Browse > Article
http://dx.doi.org/10.4334/JKCI.2017.29.4.407

Fundamental Properties of MgO Base Ceramic Mortar for Concrete Repair Material  

Park, Joon-Woo (Department of Civil and Environmental Engineering, Hanyang University)
Ann, Ki-Yong (Department of Civil and Environmental Engineering, Hanyang University)
Publication Information
Journal of the Korea Concrete Institute / v.29, no.4, 2017 , pp. 407-413 More about this Journal
Abstract
The fundamental property of magnesia phosphate cement (MPC) for concrete repair material was investigated in this research. For mechanical properties, setting time, compressive strength and tensile/flexural bond strength were measured, and hydration products were detected by X-ray diffraction. The specimens were manufactured with dead burnt magnesia and potassium dihydrogen phosphate was admixed to activate the hydration of magnesia and a borax was used as a retarder. To observe the pore structure and ionic permeability of MPC mortar, mercury intrusion porosimetry was performed together with rapid chloride penetration test (RCPT). As a result, time to set of Fresh MPC mortar was in range of 16 to 21 min depend on the M/P ratio. Borax helped delaying setting time of MPC to 68 min. The compressive strength of MPC with M/P of 4 was sharply developed to 30 MPa within 12 hours. The compressive strength of MPC mortar was in range of 11.0 to 30.0 MPa depend on the M/P ratio at 12 hours of curing. Both tensile and flexural bond strength of MPC to old substrate (i.e. MPC; New substrate to OPC; Old substrate) were even higher than ordinary Portland cement mortar (i.e. [OPC; New substrate] to [OPC; Old substrate]) does, accounting 19 and 17 MPa, respectively. The total pore volume of MPC mortar was lower than that of OPC mortar. MPC mortar had the entrained air void rather than capillary pore. The RCPT showed that total charge passed of OPC mortar had more than that of MPC mortar, which can be explained by the pore volume and pore distribution.
Keywords
magnesia phosphate cement; mechanical properties; repair material; pore structure;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Ann, K. Y, Ahn, J. H., and Ryou, J. S., "The Importance of Chloride Content at the Concrete Surface in Assessing the Time to Corrosion of Steel in Concrete Structures", Construction and Building Materials, Vol. 23, No. 1, 2009, pp. 239-245.   DOI
2 Robinson, R., Danielson, U., and Snaith, M., Road maintenance management: concepts and systems, Macmillan, 1988, p. 291.
3 Giussani, F. and Mola, F., "Durable Concrete Pavements: The Reconstruction of Runway Head 36 R of Milano Linate International Airport", Construction and Building Materials, Vol. 34, 2012, pp. 352-361.   DOI
4 Hicks, R., Moulthrop, J., and Daleiden, J., "Selecting a Preventive Maintenance Treatment for Flexible Pavements", Transportation Research Record: Journal of the Transportation Research Board, Vol. 1680, 1999, pp. 1-12.   DOI
5 Rada, G., Perera, R., Prabhakar, V., and Wiser, L., "Relating Ride Quality and Structural Adequacy for Pavement Rehabillitation and Management Decisions", Transportation Research Record: Journal of the Transportation Research Board, Vol. 2304, 2012, pp. 28-36.   DOI
6 Sugma, T. and Kukacka, L. E., "Magnesium Monophosphate Cements Derived from Diammonium Phosphate Solutions", Cement and Concrete Research, Vol. 13, No. 3, 1983, pp. 407-416.   DOI
7 Seehra, S. S., Gupta, S., and Kumar, S., "Rapid Setting Magnesium Phosphate Cement for Quick Repair of Concrete Pavements - Characterisation and Durability Aspects", Cement and Concrete Research, Vol. 23, No. 2, 1993, pp. 254-266.   DOI
8 Yang, Q., Zhu, B., and Wu, X., "Characteristics and Durability Test of Magnesium Phosphate Cement-based Material for Rapid Repair of Concrete", Materials and Structures, Vol. 33, 2000, pp. 229-234.   DOI
9 Abdelrazing, B. E. I., Sharp, J. H., and El-jazairi, B., "The Chemical Composition of Mortars Made from Magnesia-phos phate Cement", Cement and Concrete Research, Vol. 18, No. 3, 1988, pp. 415-425.   DOI
10 Yang, Q., Zhang, S., and Wu, X., "Deicer-scaling Resistance of Phosphate Cement-based Binder for Rapid Repair of Concrete", Cement and Concrete Research, Vol. 32, No. 1, 2002, pp. 165-168.   DOI
11 Xu, B., Ma, H., and Li, Z., "Influence of Magnesia-to-phosphate Molar Ratio on Microstructures, Mechanical Properties and Thermal Conductivity of Magnesium Potassium Phosphate", Cement and Concrete Research, Vol. 68, 2015, pp. 1-9.   DOI
12 Franizzio, M. and Buch, N., "Performance of Transverse Cracking in Jointed Concrete Pavements", Journal of Performance of Constructed Facilities, Vol. 172, 1999, pp. 172-180.
13 Qiao, F., Chau, C.K., and Li, Z., "Properties Evaluation of Magnesium Phosphate Cement Mortar as Patch Repair Material", Construction and Building Materials, Vol. 24, No. 5, 2010, pp. 695-700.   DOI
14 Li, Y. and Chen, B., "Factors that Affect the Properties of Magnesium Phosphate Cement", Construction and Building Materials, Vol. 47, 2013, pp. 977-983.   DOI
15 Yang, Q. and Wu, X., "Factors Influencing Properties of Phosphate Cement-based Binder for Rapid Repair of Concrete", Cement and Concrete Research, Vol. 29, No. 3, 1999, pp. 389-396.   DOI
16 Liu, N. and Chen, B., "Experimental Research on Magnesium Phosphate Cements Containing Alumina", Construction and Building Materials, Vol. 121, 2016, pp. 354-360.   DOI
17 Lahalle, H., Coumes, C. C. D., Mesbah, A., Lambertin, D., Cannes, C., Delpech, S., and Gauffinet, S., "Investigation of Magnesium Phosphate Cement Hydration in Diluted Suspension and Its Retardation by Boric Acid", Cement and Concrete Research, Vol. 87, 2016, pp. 77-86.   DOI
18 Li, J., Xu, G., Chen, Y., and Liu, G., "Laboratory Evaluation of Magnesium Phosphate Cement Paste and Mortar for Rapid Repair of Cement Concrete Pavement", Construction and Building Materials, Vol. 58, 2014, pp. 122-128.   DOI
19 Ding, Z., Dong, B., Xing, F., Han, N., and Li, Z., "Cement in Mechanism of Potassium Phosphate based Magnesium Phosphate Cement", Ceramics International, Vol. 38, No. 8, 2012, pp. 6281-6288.   DOI