Review study on the use of Boric Acid in concrete

This survey covers boric acid (H3BO3). Chemical structure of boric acid, H3BO3: The mortars including borogypsum waste had higher compressive and splitting tensile strengths and higher setting time with respect to reference sample which was borogypsum-free.it was seen that sample including 1% waste had the best splitting tensile strength (7.40 MPa) and sample including 3% waste had the best compressive strength (48.00MPa). According to results of non-calcined borogypsum experiments showed that sample including 5% waste had the best splitting tensile strength (7.63 MPa) and sample including 3% waste had the best compressive strength (45.70 MPa). they concluded that boric acid attack does not significantly affect the concrete structure. And boric acid had a negative effect on concrete strength development. Also,the rate of boric acid leaching, as with other concrete degradation mechanisms, depends in part on the rate of diffusive transport and compressive strength, expansion and setting time properties of cement decreased with the increase in B2O3 content of waste. Borogypsum is the waste that forms during boric acid production from the reaction between colemanite ore and sulphuric acid. Although borogypsum is used in many processes because of its B2O3 content it pollutes the soil and water. A long-term (2-year) investigation of rebar corrosion in reinforced concrete cracks penetrated by distilled water and boric acid solutions with pH 5.2 and 6.1 indicated a higher degree of corrosion in cracks with wider apertures and/or penetrated by water with lower pH.

Anahtar Kelimeler:

Boric acid, Borogypsum waste, Concrete structure, Concrete

Review study on the use of Boric Acid in concrete

Keywords:

Boric acid, Borogypsum waste, Concrete structure, Concrete,

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1- Kunt, K., Dur, F., Ertınmaz, B., Yıldırım, M., Derun, E. M., & Pişkin, S. (No Date). Utilization of Boron Waste as an Additive for Cement Production.2- Larsen, P. B., Nielsen, B. S., Fotel, F. L., Kortegaard, P., Slothuus, T., & Hjelmar, O. (2015). Survey of Boric acid and sodium borates (borax).3- Sevim, U.K.; Tümen, Y. Strength and fresh properties of borogypsum concrete. Construction and Building Materials. 2013; 48, 342-347.4- Bajza, A., I. Rouseková, and M. Dubík. “Can Boric Acid Corrode Concrete?” V. Bilek and Z. Kersner, eds. International Symposium on Non-Traditional Cement and Concrete, Brno University of Technology, Brno, Czech Republic. pp. 447–456. 2002.5- Jin, X., N. Jin, and Y. Tian. “Study on the Behavior and Durability of Reinforced Concrete in Boric Acid Environment.” Key Engineering Materials. Vols. 400–402. pp. 441–446. 2009.6- Bothe, J.V. and P.W. Brown. “Kinetics of Tricalcium Aluminate Hydration in the Presence of Boric Acid and Calcium Hydroxide.” Journal of the American Ceramic Society. Vol. 82. pp. 1,882–1,888. 1999.7- Simons, J., R. Keating, J. Nestell, and M. Frey. “Repair and Replacement Applications Center: Boric Acid Attack of Concrete and Reinforcing Steel in PWR Fuel Handling .8- Kavas, T.; Olgun, A.; Erdoğan, Y. Setting and hardening of borogypsum- Portland cement .9- Elbeyli, İ.Y. Utilization of industrial borax wastes (BW) for portland cement production. Turkish J. Eng. Env. Sci. 2004; 28, 281-287.10- Pabalan, R., Yang, L., & Chiang, K. T. (2013). Boric acid corrosion of concrete rebar. Paper presented at the EPJ Web of Conferences.11- Mutuk, T.; Mesci, B. Analysis of mechanical properties of cement containing boron waste and rice husk ash using full factorial design. Journal of Cleaner Production. 2014; 69, 128-132.12- W. Ramm and M. Biscoping, Nuclear Engineering and Design 179, 191 (1998) 13- Buildings.” Report 1019168. Palo Alto, California: Electric Power Research Institute. 2009.14- J.D. Dillard and J.O. Glanville, Composition and Method for Combatting Chloride-Induced Corrosion in Steel in Reinforced Concrete. U.S. Patent Number 5,092,923. Issued March 3, 1992.15- Kosmatka, Steven & Kerkhoff, Beatrix & C. Panarese, William. (2002). Design and Control of Concrete Mixtures.16- Davraz, M., KİLİNÇARSLAN, Ş., & Pehlivanoğlu, E. (2014). The Effects of Accelerating Admixture on the Mechanical Properties of Boric Acid Added Mortars. Acta Physica Polonica, A., 125 .17- Mohamed Hasan, Seraj Yousef & Mazin Nassar ,2011.Studying the effect of organic and non - organic additives in the radiation and mechanical properties of radiation shielding. Syrian Atomic Energy Commission .18- Davraz, M. (2015). The Effect of Boron Compound to Cement Hydration and Controllability of this Effect. Acta Physica Polonica, A., 128.19- CNWRA.(2011).Final Report on Boric Acid Degradation of Reinforced Concrete.Geosciences and Engineering Division .20- M. F. Kaplan., Concrete Radiation shielding, Longman Scientific & Technical, England. 1989.21- Demirbaş, A., & Karslioǧlu, S. (1995). The effect of boric acid sludges containing borogypsum on properties of cement. Cement and Concrete Research, 25(7), 1381-1384.22- RPA (2008). Assessment of the Risk to Consumers from Borates and the Impact of Potential Restrictions on their Marketing and Use. Final Report prepared for European Commission. DG Enterprise and Industry.