Study on the Effect of PVAc and Styrene on the Properties and Microstructure of MMA-Based Repair Material for Concrete

Guo, Zemeng; Xu, Liang; Lu, Shijian; Yan, Luchao; Zhu, Zhaoda; Wang, Yang

doi:10.3390/ma16113984

Cited by 3 publications

(4 citation statements)

References 45 publications

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“…As a result, the design of the I-RAPC suggests using the EM pipe pore distribution form to achieve greater strength. There is a basic inverse relationship between porosity and strength of most solid materials [31,32], as shown in Eq (7):…”

Section: The Optimized Prediction Results Compared With the Actual Re...mentioning

confidence: 99%

Study on Key Properties and Model Establishment of Innovative Recycled Aggregate Pervious Concrete

Zhao,

Zhou,

Zhang

et al. 2024

Preprint

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Traditional concrete pavements have poor water permeability, while the strength of pervious concrete pavements is low. To solve these problems, this study designed Innovative recycled aggregate pervious concrete (I-RAPC) with controllable water permeability and high strength by using response surface methodology, and investigated the effects of different pore parameters (number, diameter, material, distribution form, etc.) on the performance of I-RAPC. And the strength discount factor method was proposed to construct the theoretical calculation model of compressive strength and pipe pore parameters, and the calculation model of water permeability coefficient was established at the same time. The results show that the fewer the number of holes and the smaller the pipe diameter of I-RAPC, the higher its compressive strength and the smaller the water permeability coefficient. The theoretical model of compressive strength can accurately evaluate the discounting effect of the pore parameters on the compressive strength of I-RAPC, and the maximum relative error is only 7.52%, and the maximum relative error of the calculation model of water permeability coefficient is only 4.42%. I-RAPC has the advantages of high strength and permeability with controllable performance, which overcomes the problems of random distribution of pore space, uncertainty of water permeability, and strength of ordinary pervious concrete.

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Section: The Optimized Prediction Results Compared With the Actual Re...mentioning

confidence: 99%

Study on Key Properties and Model Establishment of Innovative Recycled Aggregate Pervious Concrete

Zhao,

Zhou,

Zhang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Through the preliminary study [ 37 ], 12% of (PVAc+ Styrene) was selected as the low shrinkage additive. The dosage is the percentage of the mass of the solution formed by PVAc dissolved in styrene to the total mass of the whole MMA prepolymer.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…Spherical fly ash, lamellar talc and needle-and-rod wollastonite powder were used as fillers, and the particle size distribution map, micromorphology map and particle size distribution data are shown in Figure 1 and Table 1. Through the preliminary study [37], 12% of (PVAc+ Styrene) was selected as the low shrinkage additive. The dosage is the percentage of the mass of the solution formed by PVAc dissolved in styrene to the total mass of the whole MMA prepolymer.…”

Section: Raw Materialsmentioning

confidence: 99%

“…Finally, the MMA prepolymer is a light yellow transparent and homogeneous fluid, free of impurities, without precipitation and delamination. Through the preliminary study [37], 12% of (PVAc+ Styrene) was selected as the low shrinkage additive. The dosage is the percentage of the mass of the solution formed by PVAc dissolved in styrene to the total mass of the whole MMA prepolymer.…”

Section: Raw Materialsmentioning

confidence: 99%

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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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Study on Key Properties and Model Establishment of Innovative Recycled Aggregate Pervious Concrete

Zhao,

Zhou,

Zhang

et al. 2024

Materials

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In order to meet the needs of low-impact development and sustainable development, there is an urgent desire to develop an innovative recycled aggregate pervious concrete (I-RAPC) that is of high strength and permeability. In this study, I-RAPC was prepared based on response surface methodology (RSM) using recycled aggregate, river sand, and different types of pipes as the materials, and the effects of different pipe parameters (number, diameter, material, and distribution form) on the performance of I-RAPC were investigated. In addition, the calculation model of the compressive strength and the permeability coefficient of I-RAPC were proposed. The results showed that the frontal- and lateral-compressive strengths of I-RAPC were 39.8 MPa and 42.5 MPa, respectively, when the pipe material was acrylic, the position was 1EM, and the diameter was 10 mm—at which time the permeability coefficient was 3.02 mm/s, which was the highest in this study. The maximum relative errors of the compressive strength calculation model and the permeability coefficient calculation model were only 7.52% and 4.42%, respectively, as shown by the post hoc test. Therefore, I-RAPC has the advantages of high strength and permeability and is expected to be applied in low-impact development in cities with heavy surface sediment content and rainfall.

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Study on the Effect of PVAc and Styrene on the Properties and Microstructure of MMA-Based Repair Material for Concrete

Cited by 3 publications

References 45 publications

Study on Key Properties and Model Establishment of Innovative Recycled Aggregate Pervious Concrete

Study on Key Properties and Model Establishment of Innovative Recycled Aggregate Pervious Concrete

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

Study on Key Properties and Model Establishment of Innovative Recycled Aggregate Pervious Concrete

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