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Mortar

About: Mortar is a research topic. Over the lifetime, 25024 publications have been published within this topic receiving 218739 citations.


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01 Jan 1995
TL;DR: In this article, the quality of bond in masonry is, to a large extent, a function of the hydration conditions and the mortar composition of the mortar-brick interface.
Abstract: The quality of bond in masonry is, to a large extent, a function of the (i) the hydration conditions and (ii) the mortar composition of the mortar-brick interface. For insight into the effects of these parameters on bond performance it is essential to dispose of quantitative information about water content changes and flow rates, occurring immediately after brick laying. This quantitative information is preferably to be obtained by means of a non-destructive testing. The paper describes the test set-up, the potentiality and the limitations of two measuring methods, using thermal neutrons, with which the required data can be acquired. Furthermore, an attempt is made to explain differences in bond performance of various brick-modar-brick combinations, using the results from neutron transmission measurements and X-ray diffraction testing.

72 citations

Journal ArticleDOI
TL;DR: In this article, the results of a series of long term corrosion tests on fiber reinforced cementitious composites containing polyethylene (PE) alone and hybrid steel cord (SC) and PE fibers were reported.
Abstract: For the purpose of global sustainability the long life of structures is essential and the durability performance of reinforced concrete structures is one of the key issues to be resolved. This paper reports the results of a series of long term corrosion tests on fiber reinforced cementitious composites containing polyethylene (PE) alone and hybrid steel cord (SC) and PE fibers. The results are also compared with ordinary mortar. The specimens are subjected to accelerated corrosion for one year by applying external potential to the steel bar anode and a cathode made out of a steel wire mesh placed outside the concrete. Durability performances of the specimens are examined through regular monitoring of the time to initiate corrosion, the corrosion area ratio, corrosion depth, and the amount of steel loss. Results show that the hybrid fiber reinforced cementitious composites (HFRCC) containing hybrid SC and PE fibers exhibited excellent performance compared to mortar and fiber reinforced cementitious composites (FRCC) containing PE fiber. The order of the durability performance is HFRCC, FRCC, and Mortar. It is observed that the sacrificial corrosion of some of the SC fibers in the HFRCC specimen played an important role in the significant reduction of steel bar corrosion in the specimen.

72 citations

Journal ArticleDOI
TL;DR: In this paper, an exploratory test program was designed to determine the expansive potential of portland cement mortar due to internal sulfate attack initially moist-cured at high temperature, and the effect of different test parameters, such as, pre-storage time, curing temperature, type of sand, sand/cement ratio, specimen size and pre-treatment, on expansion behavior was determined.

72 citations

Journal ArticleDOI
TL;DR: In this paper, the microstructures of hardened cement pastes that contain different proportions of an MgO expansive agent were investigated via scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP).

72 citations

Journal ArticleDOI
TL;DR: In this article, the dispersive and attenuative behavior of fresh cementitious material is examined through a series of ultrasonic, through-transmission measurements, showing that sand size and content dominate attenuation behavior, while the effect of entrapped air bubbles is mostly obvious at lower frequencies elevating phase velocity to values much higher than that of water.
Abstract: In the present paper, the dispersive and attenuative behavior of fresh cementitious material is examined through a series of ultrasonic, through-transmission measurements. The sand size and content dominate attenuation behavior, while the effect of entrapped air bubbles is mostly obvious at lower frequencies elevating phase velocity to values much higher than that of water. Theoretical investigation seems to explain the observed dispersion and attenuation mainly through two scattering interactions: sand embedded in paste and air bubbles in mortar. The predictions made by scattering theory follow closely the experimental data. The possibility of material characterization is discussed.

72 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
20231,804
20223,038
20211,143
20201,529
20191,628