Effect of polyacrylamide on the carbonation behavior of cement paste

Zhi, Fangfang; Jiang, Yu-Qiang; Guo, Ming-Zhi; Jin, Weizhun; Yan, Xiancui; Zhu, Pengfei; Jiang, Linhua

doi:10.1016/j.cemconres.2022.106756

Cited by 49 publications

(6 citation statements)

References 71 publications

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“…In both water-and air-cured conditions, samples with PAM replacement show an increase in calcium carbonate components in various forms. An earlier study by Zhi et al [46], which observed that PAM addition to cement aids in its carbonation, correlates with this result. These calcite components fill the pores, reducing the mix's porosity and increasing its overall strength.…”

Section: Micromechanical Analysissupporting

confidence: 68%

An experimental study on modification of pervious concrete properties using polyacrylamide

Abhinaya,

Parthiban,

Sivakumar

2024

Građ materijali i konstrukcije

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This study tends to use polyacrylamide (PAM) as a potential cement replacer for the enhancement of pervious concrete properties. The study considers four different replacement percentages and compares them with a zero-percentage replacement mix. The properties that were analysed in the fresh state before hardening include slump value, flow percentage, and fresh density of the mix. The analysis also includes further hardened properties such as water absorption, density, infiltration capacity, porosity, and abrasion resistance In addition, compressive strength under two different curing conditions, namely water curing and air curing. is analysed. Microstructural analysis is further performed using FTIR, XRD, and SEM/EDAX to confirm the experimental analysis. The results indicate a 12% increase in the maximum compressive strength in the mix with 0.5% replacement compared to the reference mix. Strength analysis also reveals that the polymer acts as a retarder. Using PAM to replace cement reduces water absorption, density, porosity, and infiltration capacity. In addition, the water treatment ability of various pervious concrete specimens is also analysed in terms of Total Suspended Solids (TSS), Chemical Oxygen Demand (COD). Total Phosphates (TP), Total Nitrogen (TN), Biochemical Oxygen Demand (BOD) and Total Organic Carbon (TOC). Results show that TP removal was as high as 82.5% in a mix with 2% replacement. Therefore, PAM can be regarded as a potential partial cement replacer in pervious concrete.

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Section: Micromechanical Analysissupporting

confidence: 68%

An experimental study on modification of pervious concrete properties using polyacrylamide

Abhinaya,

Parthiban,

Sivakumar

2024

Građ materijali i konstrukcije

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“…The loose soil particles in the modified soil are bonded together by AP, which enhances the compact ability of the polymer modified soil (as shown in Fig. 21 ), the pore structure of porous media is changed 41 , and the impermeability of porous media is greatly improved 42 . The AP filled large pores in loess, reducing the number of large pores and large seepage channels in soil.…”

Section: Discussion and Analysis Of Improved Mechanismsmentioning

confidence: 99%

Experimental investigation of influence of amide polymer on loess for subgrade

Yue,

Zhang,

Zhang

et al. 2024

Sci Rep

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The effects of moisture and drying shrinkage can lead to uneven settlement, cracking, and other diseases in loess subgrade. The objective of this study was to investigate the effects of amide polymer (AP) on the permeability, mechanical properties and crack resistance of loess by orthogonal experiments. The basic properties of AP and the permeability, mechanical properties, and dry–wet variation properties of polymer-modified loess were tested, and a scale model verification and simulation analysis were conducted. In this paper, water migration in subgrade is regulated by improving the water sensitivity of loess. By reducing the variation range of subgrade water content, the stress accumulation in subgrade caused by water is weakened. The results show that the curing time and mechanical properties of AP are directly affected by the oxidant and reducing agent, and the mechanical properties of AP are compatible with the characteristics of loess. AP filled the grain gap and reduced the permeability of loess by 34.05–280.83%. The ductility of polymer-modified loess is significantly increased, and the strain of peak strength is increased by 17.21–126.36%. AP can regulate moisture change, reduce the surface tension between particles, and reduce stress concentration. The strength loss rate was reduced by 19.98–51.21% by enhancing the cracking resistance and weakening the strength loss caused by dry and wet cycling. The increase of upper layer moisture content in the scale model of polymer-modified loess subgrade is reduced by 31.38–36.11%.

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“…Chen et al (2011) used self-developed water-soluble linear crosslinked polymer (FH) as an anti-corrosion additive and used FH to undergo a polycondensation reaction with acid to form a network membrane structure, thus preventing the corrosion of acid and alkali substances. Zhi et al (2022) explored the influence of polyacrylamide on the carbonation behavior of cement paste, and found that polyacrylamide promoted the formation of calcite with small crystal size and CaCO 3 with poor crystallinity, and transformed coarse pores into gel pores, thereby reducing porosity, improving the compactness of cement paste matrix, and thus improving the corrosion resistance of cement paste. Yuan et al (2018) used the film-forming and filling effects of nano silica latex (NL) to reduce the original permeability of cement paste and weakened the penetration and expansion effects in the corrosion process.…”

Section: Figurementioning

confidence: 99%

Application of anticorrosive materials in cement slurry: Progress and prospect

et al. 2022

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During gas well cementing operation, the erosion of acidic formation corrosive medium will destroy the cementation between the cement slurry and the sidewall in the well sealing section, reduce the mechanical properties of the cement paste, cause problems such as sidewall collapse and casing damage, seriously endanger the normal exploitation of oil and gas resources, and cause major safety accidents. Therefore, improving the corrosion resistance of cement paste is the key to ensuring long-term stable cementing of high-temperature sour gas wells. This paper summarizes the influencing factors, corrosion mechanism, corrosion test methods and research status of anti-corrosion oil well cement additives, discusses the advantages and disadvantages of each anti-corrosion additive, summarizes the latest progress and challenges of anti-corrosion oil well cement, and aims to provide some reference for researchers in related fields.

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Effect of polyacrylamide on the carbonation behavior of cement paste

Cited by 49 publications

References 71 publications

An experimental study on modification of pervious concrete properties using polyacrylamide

An experimental study on modification of pervious concrete properties using polyacrylamide

Experimental investigation of influence of amide polymer on loess for subgrade

Application of anticorrosive materials in cement slurry: Progress and prospect

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