Comparative study on the effect of two air-entrainment methods on the microstructure of cement mortar

Construction and Building Materials, Год журнала: 2025, Номер 475, С. 141200 - 141200

Опубликована: Апрель 11, 2025

Язык: Английский

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Synergy between nano SiO2-modified SAP and RHA in cement pastes: Shrinkage, microstructure, and strength

Composites Part B Engineering, Год журнала: 2025, Номер unknown, С. 112368 - 112368

Опубликована: Март 1, 2025

Язык: Английский

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Mechanical Performance of Polymer‐Modified Mortar With the Newly Designed Gradient Structure: Effect of Polymer Types and Content

Journal of Applied Polymer Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 3, 2025

ABSTRACT The varied damage faced by concrete in the pavement can be effectively alleviated adding polymer latex. However, their required high dosage and prices limit application. Hence, a new structure with gradient distribution of particles was designed. Furthermore, performance corresponding mechanism types contents on mechanical polymer‐modified mortar (PMM) were systematically evaluated. Compared to sample homogenous at same dosage, great enhancement compressive bond strength found for PMM structure. Besides, flexural also slightly increased. styrene‐acrylic (SA) ethylene‐vinyl acetate (EVA) latexes, styrene‐butadiene (SB) latex highest charge density shows lowest capability modifying PMM, which could caused its adsorption amount low ductility formed film. It further indicates that, compared tensile stress film, is more important determining PMM. To confirm obtained experimental results, finite element model mortars different structures established, modeling results match well measurements.

Язык: Английский

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Mitigating freeze–thaw deterioration of bridge deck concrete under fatigue load and freeze–thaw coupling by chopped basalt fibers

International Journal of Pavement Engineering, Год журнала: 2025, Номер 26(1)

Опубликована: Апрель 26, 2025

Язык: Английский

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Electric heating curing regimes of temperature self-controlled concrete with nano-carbon black for performance improvement in cold regions

Cement and Concrete Composites, Год журнала: 2024, Номер 152, С. 105689 - 105689

Опубликована: Июль 30, 2024

Язык: Английский

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Fire performance of superabsorbent polymers protected full-scale cold-formed steel wall lined with plasterboards

Thin-Walled Structures, Год журнала: 2024, Номер 204, С. 112353 - 112353

Опубликована: Авг. 22, 2024

Язык: Английский

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Heat transfer mechanism of superabsorbent polymers phase change energy storage cold-formed steel wall under fire

Journal of Building Engineering, Год журнала: 2024, Номер unknown, С. 110826 - 110826

Опубликована: Сен. 1, 2024

Язык: Английский

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Study on mechanical properties of a roadbed rehabilitation polyurethane grouting material after freeze–thaw cycles

Polymer Engineering and Science, Год журнала: 2024, Номер unknown

Опубликована: Сен. 13, 2024

Abstract The mechanical properties of roadbed rehabilitation polyurethane grouting material (RhPU) under freeze–thaw cycles are the theoretical basis for evaluating its long‐term performance in cold regions, but currently not well understood. Freeze–thaw cycle tests were conducted on RhPU materials different densities using a rapid freezing method to investigate effects damage characteristics RhPU. experimental results indicate that frost is fatigue failure process from outside inside. During cycle, water‐filled cells experience compression due expansion and interconnected, forming more water seepage channels, accelerating internal Therefore, dynamic elastic modulus, longitudinal wave velocity, rigidity, compressive strength all decrease with an increase cycles. Moreover, at same cycles, lower density RhPU, greater loss rate strength. square velocity samples before after correlates density, better quantifies samples. Through scanning electron microscopy, microstructure was observed, revealing exhibits severe compared higher attributed larger cell diameter contact area between adjacent cells. This indicates poorer freeze resistance low‐density Highlights variations surface studied. correlation found. effect analyzed. microscale mechanism revealed.

Язык: Английский

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Effects of cellulose fiber on shrinkage, anticrack performance, and mechanical properties of concrete

Construction and Building Materials, Год журнала: 2024, Номер 451, С. 138824 - 138824

Опубликована: Окт. 28, 2024

Язык: Английский

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