Durability of concrete exposed to dilute sulphuric acid

Raju, P. S. N.; Dayaratnam, P.

doi:10.1016/0360-1323(84)90032-5

Cited by 13 publications

(9 citation statements)

References 2 publications

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“…From the experiments conducted with different conditions, it is observed that samples lose their visual and physical properties for longer duration of exposure and higher concentrations of solutions, which in turn reduce the compressive strengths of RPC. For 1% H2SO4 solution and 28 days exposure period the strength loss observed for NSC is 70% [1], SCC is 62% [5], HVFC is 58.5% [7] and GPC is 40% [13]. All the specimens of RPC show that there is a significant reduction in compressive strength.…”

Section: Compressive Strengthmentioning

confidence: 92%

“…For 1% H2SO4 solution and 28 days exposure period the weight loss observed for NSC is 11% [1], SCC is 5% [5], HVFC is 5% [7] and GPC is 3% [13]. It is observed that the rate of…”

Section: 2 Physical Observationmentioning

confidence: 93%

“…A massive deterioration of concrete is observed due to the action of compounds of various acids such as sulphuric acid, nitric acid, hydrochloric acid etc. An investigation was carried out to study the durability properties of concrete [1]. The concrete was exposed to 0.1%, 1% and 5% concentrations of sulphuric acid.…”

Section: Durability Studies On Concretementioning

confidence: 99%

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An Experimental Investigation on Durability Properties of Reactive Powder Concrete

Dhundasi¹,

Khadirnaikar²,

Motagi³

et al. 2022

IJE

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T he durability of concrete subjected to an aggressive environment is a major issue faced by constructional engineers. Many researchers have tried to evaluate the durability characteristics of concrete against aggressive fluids. Amongst the fluids, compounds of sulphuric acid and chloride ions caused massive deterioration in concrete. Reactive powder concrete (RPC) is a type of ultra-highstrength cement composite. In the present study, an effort is made to assess durability properties of RPC. T he RPC with compressive strengths 110, 120 and 130MPa have been produced. Acid immersion test, salt crystallization test and chloride ion penetration tests have been carried out to assess the degradation of concrete. Samples were exposed to sulphuric acid solutions over a period of 60 days with concentrations varying from 0.5-2%. The salt crystallization tests were carried out by immersing samples in 14% Na2SO 4 solutions. Visual observations and deterioration in terms of mass and compressive strength reductions are recorded. The RPC showed high resistance towards the crystallization of salts. A significant amount of weight loss and strength loss was observed for the samples exposed to high concentrations of sulphuric acid. A negligible amount of chloride ion penetration was observed.

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Section: Compressive Strengthmentioning

confidence: 92%

“…For 1% H2SO4 solution and 28 days exposure period the weight loss observed for NSC is 11% [1], SCC is 5% [5], HVFC is 5% [7] and GPC is 3% [13]. It is observed that the rate of…”

Section: 2 Physical Observationmentioning

confidence: 93%

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An Experimental Investigation on Durability Properties of Reactive Powder Concrete

Dhundasi¹,

Khadirnaikar²,

Motagi³

et al. 2022

IJE

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“…When 5% CSP was added to concrete containing 10% CSA, significant concrete deterioration was observed, resulting in weight and dimension losses. The weight and diameter losses of concrete specimens subject to sulphuric acid can be used to evaluate the degree of failure of structures in such an environment [61,62]. As a result, it's critical to comprehend concrete's behavior when submerged in sulphuric acid.…”

Section: Weight and Diameter Lossesmentioning

confidence: 99%

Engineering and Durability Properties of Modified Coconut Shell Concrete

2022

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Making low-cost concrete from coconut shell ash and coconut shell aggregate increases sustainability and reduces pollution. This research investigates untreated Coconut Shell Particles (CSP) incorporated with coconut shell ash (CSA) to improve the durability properties at elevated temperatures and in sulphuric acid. Initially, the physical and mechanical properties of cube and cylinder specimens after 7, 28, 56, and 90 days of moist curing were studied. The durability properties were then carried out after the pozzolanic component of CSA in modified concrete was activated. CSA and CSP were used as partial substitutes for ordinary Portland cement and coarse aggregate in class 30 concrete with a constant water to cement ratio of 0.55. Concrete mixes included control, 5% CSP, 10% CSA, and a mixture of 5% CSP incorporated with 10% CSA. According to test results, adding 10% of CSA to CSP concrete decreased the workability, density, and water absorption properties compared to the rest of the concrete mixes. However, these results were within acceptable limits. The compressive strength of 10% CSA concrete at 90 days of moist curing was reduced by 3.23% when 5% CSP was added compared to control. The addition of 10% of CSA to 5% CSP concrete improved the split tensile strength by 2.76% higher than concrete with only 5% CSP. Concrete containing the combination of 10% CSA and 5% CSP showed a 9.37% increment in the split tensile strength compared to concrete having only 5% CSP after sulphuric acid exposure. Also, the compressive strength of 10% CSA and 5% CSP concrete improved by 30.7% when the temperature was elevated to 500 °C for 1 hour compared to the control concrete. Moreover, the reduction in the compressive strength after exposure to the elevated temperature of 500 °C for 1 hr. was still much less by an average of 75.38% compared to other waste materials blended into the concrete by previous works. Doi: 10.28991/CEJ-2022-08-02-013 Full Text: PDF

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“…Ordinary Portland cement (OPC) concrete has adverse impacts on the environment because of its production, the release of huge quantities of CO 2 , and consuming a large amount of energy [1]. Moreover, its durability is also a significant drawback, especially in acidic environments [2,3]. Thus, researchers have always been searching to compensate for OPC's shortcomings and to reduce its environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Mix Design Effects on the Durability of Alkali-Activated Slag Concrete in a Hydrochloric Acid Environment

2021

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Because of its high strength, energy reduction, and low environmental impact, researchers have encouraged considering alkali-activated slag concrete (AASC) as a potential alternative to conventional concrete. In this study, the impact of mix design parameters on the durability of AASC, made with ground granulated blast furnace slag and activated with different alkaline solutions (NaOH, KOH, and Na2SiO3) immersed up to six months in a hydrochloric acid bath with pH = 3, has been investigated. A total of 13 mix designs were made in a way that, in addition to the type of alkaline solution, considered three other parameters, namely the molarity of alkaline solutions, the weight ratio of alkaline solutions to slag, and the weight ratio of alkaline solutions to sodium silicate. Visual inspections displayed that the AASC samples almost remained intact after exposure to an HCl acid solution with pH = 3 for up to 6 months, while the OPC sample experienced deleterious deterioration. The results clearly show that AASC outperformed OPC concrete when it comes to durability in an HCl acid solution. The strength reduction and weight loss of AASC compared with OPC concrete were approximately one-tenth and one-fifth, respectively. The AASC samples containing potassium hydroxide showed a higher strength reduction and weight loss in the HCl acid solution than the samples made with sodium hydroxide.

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Durability of concrete exposed to dilute sulphuric acid

Cited by 13 publications

References 2 publications

An Experimental Investigation on Durability Properties of Reactive Powder Concrete

An Experimental Investigation on Durability Properties of Reactive Powder Concrete

Engineering and Durability Properties of Modified Coconut Shell Concrete

Mix Design Effects on the Durability of Alkali-Activated Slag Concrete in a Hydrochloric Acid Environment

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