Browse > Article
http://dx.doi.org/10.4334/JKCI.2017.29.1.085

Examination of the Characteristics of Mortar Mixed with Boron Compounds Presenting Various Levels of Alkalinity  

Lee, Binna (Korea Institute of Civil Engineering and Building Technology)
Lee, Jong-Suk (Korea Institute of Civil Engineering and Building Technology)
Min, Jiyoung (Korea Institute of Civil Engineering and Building Technology)
Lee, Jang Hwa (Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of the Korea Concrete Institute / v.29, no.1, 2017 , pp. 85-92 More about this Journal
Abstract
This study examines the characteristics of mortar mixed with various boron compounds. The adapted boron compounds, classified into acid, slightly alkaline and strongly alkaline with respect to the value of the pH are acid-based boron (AA), low-alkaline-based boron (AB), and high-alkaline-based boron (HB). The pH test, setting test and compressive strength test are performed to evaluate the physical and chemical properties of mortar, and SEM imaging is conducted to analyze the microstructure of mortar. The measured pH shows that the specimens mixed with boron compounds have lower pH than the basic mortar without boron and that loss of pH occurs according to time. The setting test reveals that the initial and final setting times of the specimens mixed with boron compounds occur later than the basic mortar, which disagrees slightly with the previous literature stating that the setting time can be shortened according to the alkalinity. From the compressive strength test and SEM imaging results, it is recommended to determine the optimal content of boron considering type and composition of the boron compounds.
Keywords
boron compound; alkalinity; pH measurement test; scanning electron microscope (SEM);
Citations & Related Records
연도 인용수 순위
  • Reference
1 Sato, K., Tanosaki, T., Fugii, H., and Miura, T., "Analysis of Induced Radionuclides in Low-activation Concrete (Limestone Concrete) Using the 12 GeV Proton Synchrotron Accelerator Facility at KEK", Radiation Protection Dosimetry, Vol. 116, No. 1-4, 2005, pp. 647-652.   DOI
2 Park, S. J., "Neutron Shielding and Low-activation Characteristics of Borated Concretes", Master's Thesis, 2013.
3 Korea Institute of Energy Technology Evaluation and Planning(KETEP), "Development of Epoxy Nanocomposite, Based Neutron Shielding Materials for Spent Fuel Cask", Korea Atomic Energy Research Institute(KAERI), 2013.
4 Ministry of Trade Industry Energy(MOTIE), "Development of Radiation Shielding Material Usings an Ultra-fine Boron Dispersed Polymer Matrix", Korea Atomic Energy Research Institute(KAERI), 2009.
5 Cho, S. H., Kim, I. S., Do, J. B., Ro, S. G., and Park, H. S., "Fabrication and Characteristics of Modified and Hydrogenated Bisphenol-A type Epoxy Resin Based Neutron Shielding Materials", Hwahak Konghak, Vol. 35, No. 5, 1997, pp. 661-666.
6 Pyzik Aleksander, J., and Aksay Ilhan, A., "Processing of Boron Carbide-aluminum Composites", Journal of the American Ceramic Society, Vol. 72, Issue. 1, 1989, pp. 775-780.   DOI
7 Jun, J. H., Kim, J. W., Bae, Y. J., and Seo, Y. S., "Enhancement of Dispersion and Adhesion of B4C Particles in Epoxy Resin Using Direct Ultrasonic Excitation", Journal of Nuclear Materials, Vol. 416, Issue. 3, 2011, pp. 293-297.   DOI
8 Kharita, M. A., Yousef, S., and Alnassar M., "Review on th Addition of Boron Compounds to Radiation Shielding Concrete", Progress in Nuclear Energy, Vol. 53, Issue. 2, 2011, pp. 207-211.   DOI
9 Polley, C., Cramer, S. M., and De La Cruz, R. V., "Potential for Using Waste Glass in Portland Cement Concrete", J. Master.Civ.Eng., Vol. 10, No. 4, 1998, pp. 210-219.   DOI
10 Jang, B. K., "Properties of Mortar with Borosilicate Glass Used to Enhance Neutron Shielding Performance, Master' Thesis, 2016.
11 Okuno, K., "Neutron Shielding Material Based on Colemanite and Epoxy Resin", Radiation Protection Dosimetry, Vol. 115, No. 1-4, 2005, pp. 258.   DOI
12 Yasemin. Y., and Ahmet, B., "Investigation of Neutron Shielding Efficiency and Radioactivity of Concrete Shields Containing Colemanite", Journal of Nuclear Materials, Vol. 212-215, Part B, 1994, pp. 1720-1723.   DOI
13 You, K. S., Fujimori, H., Ioku, K., and Goto, S., "Effect of Boric Acid on Hydration of Calcium Sulfoaluminate", Journal of the Society of Inorganic Materials, Vol. 3 No. 298, 2002, pp. 137-142.
14 Min, J., Lee, J. S., Lee, B., and Lee, J. H., "Studies on Setting Time and Compressive Strength of Mortar Incorporating Boric Acid", The Korea Institute for Structural Maintenance and Inspection, 2015, pp. 409-410.
15 Lee, B., Lee, J. S., Min, J., An, G. H., and Lee, J. H., "The Physical Properites of Mortar Containing Boron Compounds", KCI Concrete Journal, Vol. 26, No. 2, 2015, pp. 663-664.
16 Kula, I., Olgun, A., Sevinc, V., and Erdogan, Y. "An Investigation on the Use of Tincal ore Waste Fly Ash and Coal Bottom Ash as Portland Cement Replacement Materials", Cement and Concrete Research, Vol. 32, Issue. 2, 2002, pp. 227-232.   DOI
17 Korean Industrial Standards, Testing method for time of setting of concrete mixture by penetration resistance (KS F 2436), Korean Agency for Technology and Standards, 2007, 9pp.
18 ASTM C637 Standard specification for aggregates for radiation-shielding concrete, ASTM International, 3pp.
19 ASTM C638, Standard descriptive nomenclature of constituents of aggregates for radiation-sheilding concrete, ASTM International, 4pp.
20 Korean Industrial Standards, Standard test method for pH of soils (KS F 2103), Korean Agency for Technology and Standards, 2013, 4pp.
21 Korean Industrial Standards, Testing method for compressive strength of hydraulic cement mortars (KS L 5105), Korean Agency for Technology and Standards, 2007, 5pp.
22 Metin, D., "The Effect of Boron Compounds on the Properties of Cementitous Composites", Science and Engineering of Composite Materials, Vol. 17 No. 1, 2010, pp. 1-18.   DOI
23 Metin, D., "The Effect of Boron Compound to Cement Hydration and Controllability of This Effect", ACTA PHYSICA POLONICA A, Vol. 128, No. 2-B, 2015, pp. 26-33.   DOI
24 Volkmam, D. E. and Bussolini, P. L., "Comparison of Fine Particle Colemanite and Boron Frit in Concrete for Time-Strength Relationship", Journal of Testing and Evaluation, Vol. 20, Issue. 1, 1992, pp. 92-96.   DOI
25 Olguna, A., Kavasb, T., Erdogana, Y., and Once, G., "Physico Chemical Characteristics of Chemically Activated Cement Containing Boron", Building and Environment, Vol. 42, Issue. 6, 2007, pp. 2384-2395.   DOI
26 Targan, S., Olgun, A., Erdogan, Y., and Sevinc, V. "Effects of Supplementary Cementing Materials on the Properties of Cement and Concrete", Cement and Concrete Research, Vol. 32, Issue. 10, 2002, pp. 1551-1558.   DOI
27 Shi, C., and Day, R. L., "Comparison of Different Methods for Enhancing Reactivity of Pozzolans", Cement and Concrete Research, Vol. 31, Issue. 5, 2001, pp. 813-818.   DOI
28 Shi, C., and Day, R.L., "Pozzolanic Reaction in the Presence of Chemical Activators, Part II. Reaction Products and Mechanism", Cement and Concrete Research, Vol. 30, Issue. 4, 2000, pp. 607-613.   DOI
29 Lee, C. Y., Lee, H. K., and Lee, K. M., "Strength and Microstructural Characteristics of Chemically Activated Fly Ash-cement System", Cement and Concrete Research, Vol. 33, Issue. 3, 2003, pp. 425-431.   DOI
30 Metha, P. K., "Concrete-structure, Properties, and Materials", Prentice-Hall, 1986, pp. 64-69.