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Effect of Admixture on Freeze-thaw Damage of Sleeve Grouting Materials
Published 2020-01-01“…This paper compares the physical and mechanical properties of sleeve grouting materials with different admixtures under freeze-thaw action by means of control variable method,studies the effects of different admixtures and different contents on the apparent morphology,mass loss and strength loss of sleeve grouting materials under freeze-thaw action,and further analyzes the change of species,quantity and morphology of hydration products in freeze-thaw cycle by SEM (scanning electron microscope).The results show that:After 120 freeze-thaw cycles,the mass loss of mortar specimens with admixtures is less than 2%,which is lagged compared with the compressive strength loss;Based on the gray correlation analysis,the impact of expansion agent on the mechanical properties of mortar specimens under different freeze-thaw cycles is the lowest.However,with the addition of defoaming agent,the physical and mechanical properties of mortar specimens are more sensitive to freeze-thaw damage,and the sensitivity will increase with the increase of defoaming agent contents;From the microstructure analysis,the addition of expansion agent can improve the stability of internal C-S-H gel system after freeze-thaw action.…”
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263
A Mesoscopic Simulation for the Early-Age Shrinkage Cracking Process of High Performance Concrete in Bridge Engineering
Published 2017-01-01“…On a mesoscopic level, high performance concrete (HPC) was assumed to be a heterogeneous composite material consisting of aggregates, mortar, and pores. The concrete mesoscopic structure model had been established based on CT image reconstruction. …”
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264
Numerical simulation of the de-bonding phenomenon of FRCM strengthening systems
Published 2018-12-01“…The equilibrium of an infinitesimal portion of the reinforcement and the mortar layers composing the strengthening systems allows to derive the governing equations. …”
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265
Shear Performance of Concrete Beams with a Maximum Size of Recycled Concrete Aggregate
Published 2022-01-01“…However, the major drawback of the recycled concrete aggregate (RCA) has been the contribution of the cement paste mortar attached to the surface. The quantity of surface-attached mortar on the virgin aggregate dominates and defines the shear performance of concrete beams. …”
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266
Performance Analysis of a Recycled Concrete Interfacial Transition Zone in a Rapid Carbonization Environment
Published 2018-01-01“…Overall, there are significant differences in the microstructures between the ITZ and the mortar matrix before and after carbonization.…”
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267
The Combined Effect of the Initial Cure and the Type of Cement on the Natural Carbonation, the Portlandite Content, and Nonevaporable Water in Blended Cement
Published 2017-01-01“…It was observed that the reduction of the curing period makes the mortars more sensitive. The kinetics of process was evaluated from Ca(OH)2 content and nonevaporable water contained in mortars. …”
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268
Failure Modes in Concrete Repair Systems due to Ongoing Corrosion
Published 2017-01-01“…Numerical results were verified by experimental tests when SHCC, nonreinforced material (repair mortar), and commercial repair mortar are used as repair materials. …”
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269
Influence of Inertia and Low Active Mineral Admixture on Strength and Microstructure of Cement-Based Materials
Published 2016-01-01“…Cement-based materials were investigated by comparing the strength and microstructure of pastes and mortar containing limestone powder or low quality fly ash. …”
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270
Improvement of biomass bottom ash properties by carbonation and pulverisation methods for application in cement-based materials
Published 2024-12-01“…Pulverised BBA enhance compressive strength of mortar compared to a conventional CEM II type cement and Carbonated BBA mortar mixtures improved 28-day compressive strength by 35-55% compared to non-carbonated BBA. …”
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271
Mesoscopic Finite Element Method of the Effective Thermal Conductivity of Concrete with Arbitrary Gradation
Published 2018-01-01“…In addition, the influence factors (thermal conductivity of coarse aggregate, cement mortar, and volume fraction of coarse aggregate) of the effective thermal conductivity of concrete were analyzed. …”
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272
Chlamydophila pneumoniae Infection and Its Role in Neurological Disorders
Published 2010-01-01Get full text
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273
Investigation on Reinforced Mechanism of Fiber Reinforced Asphalt Concrete Based on Micromechanical Modeling
Published 2017-01-01“…Results show that maximum stress of asphalt mortar is lower compared to the control concrete when the fiber length is longer than 12 mm. …”
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274
The effect of long-term and short-term loading on the flexural behavior of RC beams strengthened with the NSM method
Published 2025-07-01“…In this method, two types of matrices—epoxy resin and repair mortar—are used to bond glass fiber reinforced polymer (GFRP) reinforcing bars to the concrete beams. …”
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275
Physicochemical Performance of Portland-Rice Husk Ash-Calcined Clay-Dried Acetylene Lime Sludge Cement in Sulphate and Chloride Media
Published 2019-01-01“…This paper reports leach and/or intake of SO42−, Cl−, Ca2+, Na+, and K+ from and/or into cement mortar cubes made from a novel cementious material in naturally encountered environmental simulated media. …”
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276
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A Mesoscale Approach for Concrete Block Masonry
Published 2022-01-01“…Besides, an obvious nonlinear relationship between the masonry compressive strength and the mortar was also observed.…”
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278
Elementi di interfaccia per l’analisi di strutture murarie
Published 2013-04-01“…The present paper deals with the modelling of the mechanical behaviour of masonry elements regarded as heterogeneous systems, made of mortar, bricks and interfaces. Thus, the adopted computational strategy consists in modelling the brick units, the mortar joints and the interfaces responsible for the mortarbrick decohesion mechanisms; to this end, a special interface model combining damage and friction is proposed. …”
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279
Material Performance Tests of the Polymer-Cement Thin Spray-On Liner
Published 2020-01-01“…When a VAE emulsion was used to modify cement mortar, the results showed that the VAE modified mortar had the best viscosity performance of any of the tested emulsions at the same polymer–cement ratio. …”
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280
Effects of different lengths and doses of raw and treated sisal fibers in the cement composite material
Published 2025-01-01“…Generally, the present study revealed the importance of calcined bentonite-treated sisal fibers in a mortar mixture for improved durability, physical and mechanical properties.…”
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