Mass Change Prediction Model of Concrete Subjected to Sulfate Attack

Abstract

The present study suggested a mass change prediction model for sulfate attack of concrete containing mineral admixtures through an immersion test in sulfate solutions. For this, 100% OPC as well as binary and ternary blended cement concrete specimens were manufactured by changing the types and amount of mineral admixture. The concrete specimens were immersed in fresh water, 10% sodium sulfate solution, and 10% magnesium sulfate solution, respectively, and mass change of the specimens was measured at 28, 56, 91, 182, and 365 days. The experimental results indicated that resistance of concrete containing mineral admixture against sodium sulfate attack was far greater than that of 100% OPC concrete. However, in terms of resistance against magnesium sulfate attack, concrete containing mineral admixture was lower than 100% OPC concrete due to the formation of magnesium silicate hydrate (M-S-H), the noncementitious material. Ultimately, based on the experimental results, a mass change prediction model was suggested and it was found that the prediction values using the model corresponded relatively well with the experimental results.

Self-Curing Concrete under Sulfate Attack

“…However in real concrete structures the sulfate attack can become more severe because of micro cracks (caused by restrained thermal and drying shrinkage or loading in service) which favor a deeper penetration of sulfate into the cement matrix. Results are in agreed with Lee et al, (2015) [23].…”

Damage Constitutive Model and Mechanical Performance Deterioration of Concrete under Sulfate Environment

“…e durability and service life of concrete structures can be significantly affected by the environment. Especially, the sulfate attack is a major threat to the durability of concrete structures, which causes strength loss [1], changes of mass [2] and microstructure [3], degradation of durability [4] and service life [5], deformation behavior [6], formations of expansive products [7] and noncohesive mass [8], and loss of cohesion of cement hydration products [9,10]. As a consequence, the reliability of the concrete structures is degraded gradually [11].…”

Assessing the Effect of Seawater and Magnesium Sulfate on the Durability and Strength Properties of Cement-Stabilized Full-Scale Soilcrete Column Constructed in Clayey Soil

“…However, the reduction rate was more remarkable than seawater because the C-S-H rapidly loses calcium (Ca) ions and transforms them into magnesium silicate hydrates (Mg-S-H). Therefore, its non-binding compounds are generated when magnesium hydroxide reacts with silica gel [31][32][33]. In this case, specimen SC35-35 was notated as a minimum value of mass change for 45 and 105 days, which are − 7.4% and − 9b.…”