Review study on the use of Boric Acid in concrete

Yıl 2018, Cilt: 1 Sayı: 2, 67 - 71, 17.12.2018

Abudalrhman Mohamed Bsher Aldakshe

Öz

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

Kaynakça

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