Investigation on the Sulfuric Acid Corrosion Mechanism for Concrete in Soaking Environment

Min, Hongguang; Zhang, Song

doi:10.1155/2018/3258123

Cited by 27 publications

(8 citation statements)

References 23 publications

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“…The fibers and aggregates were exposed as the corrosion cycles increased. In the later stage, the M specimens under environment I seemed to be more damaged than the specimens under environment II [ 47 ]. Both M and P specimens became soft after 12 acid-alkaline cycles, while the surface remained a little bit harder in environment II.…”

Section: Resultsmentioning

confidence: 99%

Durability Study on High-Performance Fiber-Reinforced Mortar under Simulated Wastewater Pipeline Environment

Wang

Zhao

et al. 2021

Materials

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The acid–alkaline-inducd corrosive environments inside wastewater concrete pipelines cause concrete structural deterioration and substantial economic losses all over the world. High-performance concrete/mortar (HPC) was designed to have better resistance to corrosive environments, with enhanced service life. However, the durability of HPC in wastewater pipeline environments has rarely been studied. A high-performance mortar mixture (M) reinforced by supplemental materials (including fly ash and silica fume) and polyvinyl alcohol (PVA) fibers, together with a mortar mixture (P) consisting of cement, sand and water with similar mechanical performance, were both designed and exposed to simulated wastewater pipeline environments. The visual appearance, dimensional variation, mass loss, mechanical properties, permeable pore volume, and microstructure of the specimens were measured during the corrosion cycles. More severe deterioration was observed when the alkaline environment was introduced into the corrosion cycles. Test results showed that the M specimens had less permeable pore volume, better dimensional stability, and denser microstructure than the P specimens under acid–alkaline-induced corrosive environments. The mass-loss rates of the M specimens were 66.1–77.2% of the P specimens after 12 corrosion cycles. The compressive strength of the M specimens was 25.5–37.3% higher than the P specimens after 12 cycles under corrosive environments. Hence, the high-performance mortar examined in this study was considered superior to traditional cementitious materials for wastewater pipeline construction and rehabilitation.

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Section: Resultsmentioning

confidence: 99%

Durability Study on High-Performance Fiber-Reinforced Mortar under Simulated Wastewater Pipeline Environment

Wang

Zhao

et al. 2021

Materials

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“…Correspondingly, the mix designation B5R15 showed a lesser surface erosion than that of the control mix, as shown in Figure 10. Min & Song (2018) also reported that the crucial corrosion can be indicated in the yellow color area that appeared on the exposed surface of the cement composite to sulfuric acid solution.…”

Section: Weight Lossmentioning

confidence: 96%

Sustainable mortar and concrete made from palm oil boiler clinker aggregate comprising rice husk ash and calcium bentonite: Compressive strength and durability assessment

Kueaket¹,

Tonnayopas²

2021

j.appsci

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This research was conducted to assess the performances of mortars and concretes made from palm oil boiler clinker aggregate (POBC) blending with rice husk ash (RHA) and calcium bentonite (CB). These blends were used to substitute of ordinary Portland cement (OPC) in the combined proportions of 5wt%CB+5wt%RHA, 5wt%CB+15wt%RHA, 15wt%CB+5wt%RHA, 10wt%CB+20wt%RHA, and 20wt%B+10wt%RHA. The POBC mortars were examined for compressive strength, water absorption, sulfuric acid resistance, and microstructural characterization at the age of 7, 28, and 56 days. Subsequently, the POBC concretes were tested for rapid chloride ion permeability and capillary absorption at 28 and 56 days of curing ages. As a result, the 56-day POBC mortar with the optimum blending of 5% CB and 15% RHA provided the greatest compressive strength of 48 MPa as well as revealed denser microstructure observed under scanning electron microscope (SEM) and greater durability against sulfuric acid attack which surpassed those of the POBC mortar without CB and RHA. Proportionately, the incorporation of 5-10% CB with 15-20% RHA to POBC concrete cured up to 56 days possessed greater durability performances by reducing the chloride ion permeability from moderate to very low ranges as well as lessening capillary absorption. The practical implications of this study are that the POBC could be potentially used in the building sector as a substitute to the conventional aggregates. In addition, the use of CB and RHA could be possibly replaced cement in the optimum proportions without compromising the strength and durability to produce efficiently sustainable POBC mortar and concrete.

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“…The most negative effect on cementitious materials is given by sulfuric acid due to the synergistic effect of acid attacks and sulphates [27][28][29]. By the reaction among calcium aluminates (C 3 A) and portlandite (CH) with sulfates ions, two major expansive products are formed: secondary ettringite (Ca 6 Al 2 (SO 4 )3(OH)12.26H 2 O, a principal destructive compound) and secondary gypsum (CaSO 4 .2H 2 O, soft non-binder compound) [30][31][32].…”

Section: Chemical Attacksmentioning

confidence: 99%

Shot-Earth as Sustainable Construction Material: Chemical Aspects and Physical Performance

Barbieri,

Lanzoni,

Marchetti

et al. 2024

Sustainability

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Soil has long been one of the most widely used building materials globally. The evolution of soil-based construction materials has seen steady improvement over the centuries, even as traditional materials have given way to newer options like reinforced concrete. Nonetheless, soil-based construction has maintained its relevance and, in recent decades, has garnered increased attention due to sustainability concerns and renewed research interest. Among the innovative earth-based materials, shot-earth (SE) stands out as one of the most advanced. Research on SE has facilitated efficient handling of soil variability in mix design and provided structural engineers with relevant models for dimensioning and detailing reinforced SE constructions. This paper focuses on studying the durability characteristics of various types of SE to ascertain their ability to withstand environmental degradation over their intended lifespan. The tests conducted indicate that SE can serve as a viable construction material in numerous real-life scenarios, offering a sustainable alternative to existing materials.

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Investigation on the Sulfuric Acid Corrosion Mechanism for Concrete in Soaking Environment

Cited by 27 publications

References 23 publications

Durability Study on High-Performance Fiber-Reinforced Mortar under Simulated Wastewater Pipeline Environment

Durability Study on High-Performance Fiber-Reinforced Mortar under Simulated Wastewater Pipeline Environment

Sustainable mortar and concrete made from palm oil boiler clinker aggregate comprising rice husk ash and calcium bentonite: Compressive strength and durability assessment

Shot-Earth as Sustainable Construction Material: Chemical Aspects and Physical Performance

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