Improved Crack Resistance and Pore Structure of Cement-Based Materials by Adding EVA Powder

Cai, Runze; Qi, Hui; Mao, Jize; Lv, Jianfu; Jin, Deqi

doi:10.1061/(asce)mt.1943-5533.0004143

Cited by 9 publications

(3 citation statements)

References 58 publications

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“…Mortar is a porous material and pore structure is inseparable and closely related to the macroscopic properties [ 46 , 47 , 48 ]. For analyzing the influence mechanism of filler on PMMA repair mortar from a microscopic point of view, the porosity of PMMA repair mortar was tested by using piezomercury method.…”

Section: Resultsmentioning

confidence: 99%

Influence of Different Types of Fillers on the Performance of PMMA-Based Low-Temperature Rapid Repair Mortar

Zhu,

Xu,

Deng

et al. 2024

Materials

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In order to further optimize the performance of PMMA (Polymethyl Methacrylate) repair mortar. In this paper, fly ash, talcum powder and wollastonite powder are used as fillers to modify the PMMA repair mortar. The effects of these three fillers on the working performance, mechanical performance and durability of PMMA repair mortar were explored. The study shows that the three fillers have good effect on the bond strength of the repair mortar, in which the fly ash has the best effect on the mechanical performance. The mechanical properties of PMMA repair mortar were best when the amount of fly ash was 60 phr (parts per hundred, representing the amount of the material added per hundred parts of PMMA). At this time, the 28 d compressive strength was 71.26 MPa and the 28 d flexural strength was 28.09 MPa, which increased by 13.31% and 15.33%, respectively. Wollastonite powder had the least negative effect on the setting time of the PMMA repair mortar. When the dosage of wollastonite powder was increased to 100 phr, the setting time was only extended from 65 min to 94 min. When the talc dosage was 60 phr, the best improvement in salt freezing resistance was achieved. After 100 cycles of salt freezing, the mass loss rate and strength loss rate decreased to 0.159% and 4.97%, respectively, which were 75.1% and 37.7% higher than that of the control group. The addition of all three fillers reduced the porosity and the proportion of harmful pores in the mortar. This study contributes to a comprehensive understanding how different types of fillers affect PMMA repair mortars, and it also provides theoretical support for the further development of low-temperature rapid repair mortars.

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Section: Resultsmentioning

confidence: 99%

Influence of Different Types of Fillers on the Performance of PMMA-Based Low-Temperature Rapid Repair Mortar

Zhu,

Xu,

Deng

et al. 2024

Materials

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“…by mass of GBFS). EVA copolymer can improve the crack resistance of the coating [21,22], the content is controlled to be 2%.(i.e. by mass of GBFS).…”

Section: Methodsmentioning

confidence: 99%

Graphene's effect and mechanism on the properties of alkali-activated slag coating

Wang

Liu

Hua

et al. 2023

Mater. Res. Express

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Alkali-activated coating materials have the problem of easy cracking. Alkali-activated materials are brittle and prone to shrinkage. When used as a coating, cracks appear on the surface. It will peel off from the substrate material and the adhesion will be reduced. In order to improve the crack resistance and adhesion of alkali-activated materials as repair and protective coatings, the effect of graphene on the properties of coatings was investigated. In this paper, a coating was prepared with blast furnace slag as the main raw material and sodium silicate water glass as the activator. By adding graphene dispersion to improve the microstructure and macroscopic properties of the coating. In the experiment, 0.2 %, 0.4 %, 0.6 %and 0.8 % graphene dispersions were added to the alkali-activated slag coating, and compared with the blank sample. The drying time, apparent properties and bonding strength of the coatings with different thicknesses were measured. It was found that the graphene dispersion could improve the crack resistance of the coating. The bonding strength of the coating at 7d and 28d was also improved. When 0.8 % was added, the maximum bonding strength was 1.577 MPa. Combined with XRD, FTIR and SEM, it was found that graphene dispersion may promote the formation of zeolite phase in alkali-activated slag coating and reduce the porosity at the interface between coating and substrate. This promotes chemical bonding at the interface. The experimental results show that the graphene dispersion is beneficial to improve the cracking of the coating and enhance the bond strength with cement mortar.

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“…With the gradual maturity of polymer-modified concrete technology, various polymers are now added to meet industry-specific performance requirements. For instance, polymer-modified cement mortar is known for its good crack and acid–alkali corrosion resistance [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Acrylate Emulsion-Modified Cement-Based Materials

Su,

He,

et al. 2024

Molecules

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Polymer-modified cement-based materials have been widely used in building materials. Polymers play a crucial role in improving the performance of cement-based materials. At the same time, different polymers are added according to specific special requirements to meet the needs of the industry. Therefore, this paper reviewed the research on the performance and mechanism of acrylic lotion in modifying cement-based materials. Firstly, the role of acrylate lotion in the improvement of the volume stability, mechanical properties, and durability of cement-based materials was discussed to explore the advantages and disadvantages further, optimize the application of polymer in cement-based materials according to the performance improvement, and amplify the advantages of polymer modification. Secondly, the physicochemical mechanism of acrylate-lotion-modified cement-based materials was discussed, and the products and reactants of acrylate lotion in the reaction process of cement-based materials, as well as the interaction mechanism of acrylic lotion and cement hydrates, were clarified. Cement hydration is a crucial step in exploring the mechanism of polymer-modified cement-based materials. Due to the acrylate lotion filled on the cement surface and the physical and chemical interaction between them, the cement hydration is delayed, resulting in the cement retarding phenomenon. This paper describes its mechanism. Finally, the improvement effect of acrylate lotion on the performance of cement-based materials was reviewed, the research methods of mechanism research on acrylate-lotion-modified cement-based materials were evaluated, and suggestions for future research methods were provided.

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Improved Crack Resistance and Pore Structure of Cement-Based Materials by Adding EVA Powder

Cited by 9 publications

References 58 publications

Influence of Different Types of Fillers on the Performance of PMMA-Based Low-Temperature Rapid Repair Mortar

Influence of Different Types of Fillers on the Performance of PMMA-Based Low-Temperature Rapid Repair Mortar

Graphene's effect and mechanism on the properties of alkali-activated slag coating

Mechanism of Acrylate Emulsion-Modified Cement-Based Materials

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