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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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Journal ArticleDOI
TL;DR: This dataset describes the compressive strength and ultrasonic pulse velocity of mortar consisted of high content of GGBS and CKD combinations as a partial substitute for cement at the ages of 1, 2, 3, 7, 14, 21, 28, 56, 90 and 550 days, which can help the researchers to understand the behaviour of GG BS and CKd in high replacement levels for cement during early and later ages.

80 citations

Journal ArticleDOI
TL;DR: A printing system including supporting subsystem, controlling subsystem, feeding subsystem, and extruding subsystem was developed by considering the properties of mortar and the large-size characteristics of 3D mortar printing (3DMP), and it is shown that replacing natural sand with 25% of recycled sand caused higher green strength and no obvious decrease in hardened mechanical properties.
Abstract: 3D concrete printing (3DCP) has received worldwide attention in recent years. However, very limited studies have been carried out on the simultaneous research and mutual coordination of printing system, process design and printing material. In this study, a printing system including supporting subsystem, controlling subsystem, feeding subsystem, and extruding subsystem was developed by considering the properties of mortar and the large-size characteristics of 3D mortar printing (3DMP). The process design of 3DMP, such as tool path and printing parameters, was also redesigned to improve the printing qualities. The properties of printing mortars with/without recycled sand were then comparatively studied, followed by a successful on-site printing of a 2.5 m × 2.5 m × 3 m room. Results have shown that replacing natural sand with 25% of recycled sand caused higher green strength and no obvious decrease in hardened mechanical properties. By properly adjusting printing parameters, the printing mortars (with or without recycled sand) can be well-matched with the printing system. This verifies the practicability of the developed printing system as well as the method of partial application of recycled sand in 3DMP. Besides, it is recommended that both real-time monitoring system and continuous printing are necessary to achieve higher printing quality and efficiency.

80 citations

Journal ArticleDOI
TL;DR: In this paper, photocatalytically self-cleaning mortars and concretes can additionally contribute to the elimination of volatile organic compounds (VOC's) present in indoor and outdoor atmospheres.
Abstract: This article demonstrates that photocatalytically self-cleaning mortars and concretes can additionally contribute to the elimination of volatile organic compounds (VOC's) present in indoor and outdoor atmospheres. Formaldehyde was chosen as a representative VOC air pollutant. Titania (PC-105 from Millennium Chemicals) was added in a white Portland Cement (Societe Ciment Calcia) to prepare mortar samples according to a normalized methodology. A normalized steady-state was chosen after aging the samples for three months. The distribution of titania at the exposed surface of the mortar sample was quantitatively examined, using Raman spectroscopy mapping and diffuse reflectance spectroscopy. Interestingly, when varying the weight percentage of titania (with respect to the cement weight) between 0 and 10 wt%, it was demonstrated that the “occurrence rate” (or presence probability) of 100% in TiO 2 at the surface of the mortar was already reached at 5 wt% TiO 2 . Direct linear correlation between UV-absorptance and Raman spectroscopy mapping spectroscopy was obtained. In parallel, the photocatalytic removal of formaldehyde, performed in a dynamic flow reactor with an in-line photoacoustic analytic spectrometer was established by the curve rate r = f (TiO 2 wt%). Since concretes and mortars are solids which can be considered as “breathing materials”, which absorb and/or adsorb many compounds, it was carefully and quantitatively determined what part of formaldehyde was adsorbed and/or absorbed by the mortar, either in the dark or under UV. The real and true photocatalytic nature of the disappearance reaction relative to UV-irradiated TiO 2 let us conclude that, in addition to their photocatalytic self-cleaning properties, such cementitious materials can possibly contribute to the elimination of atmospheric VOC's which may come in contact with them.

80 citations

Journal ArticleDOI
TL;DR: In this paper, an experimental study on the magnesium sulfate resistance of mortar and paste specimens incorporating 0, 5, 10% and 15% metakaolin (MK) was performed using visual examination, reduction in compressive strength and expansion measurements.

79 citations

Journal ArticleDOI
TL;DR: In this paper, phase change materials (PCMs) and rubber particles from recycled tires were used in portland cement mortar with a potential application as insulation mortar, and series of tests were designed and conducted including compressive strength, flexural strength, thermal conductivity, drying shrinkage, and bond strength tests at 7 days and 28 days of age.

79 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