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Relevant bibliographies by topics / Air entrainment in cement and cement mortars

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Journal articles

Academic literature on the topic 'Air entrainment in cement and cement mortars'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Air entrainment in cement and cement mortars"

1

Miera, Patrycja. "Air Content in Fresh Air-Entraining Cement Mortars." IOP Conference Series: Materials Science and Engineering 1203, no. 3 (2021): 032016. http://dx.doi.org/10.1088/1757-899x/1203/3/032016.

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Abstract The durability of a cement composite is the most important criterion for assessing this material. However, due to the durability of the cement composite, its frost resistance is an important property. In order to ensure concrete frost resistance, the European standard PN-EN 206-1: 2013 requires its aeration at the level of 4 - 7%. The Committee 201 of the American Concrete Institute (ACI) also requires the use of an air-entraining admixture in concretes exposed to frost damage. The amount of air-entraining admixture is significantly influenced by the composition of the cement used. In

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2

Tian, Ye, Zong Jin Li, Hong Yan Ma, Xian Yu Jin, and Nan Guo Jin. "Physical and Chemical Influence of Polyacrylate Latex on Cement Mortars." Advanced Materials Research 261-263 (May 2011): 807–11. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.807.

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In this research, the physical and chemical influence of polyacrylate (PA) latex on cement-based materials were studied using polymer modified mortars with polymer/cement (P/C) ratios of 0%, 5% and 10%. Physically, the mechanical performance of PA latex modified mortars was investigated with compression toughness energy and bending strength. Further more, a comparison of the pore structure and porosity between PA latex modified and unmodified mortars was conducted. The chemical reactions between PA polymer and cement hydrates were clarified with thermogravimetric (TG) analysis. It can be concl

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3

Riyazi, Siamak, John T. Kevern, and Matt Mulheron. "Super absorbent polymers (SAPs) as physical air entrainment in cement mortars." Construction and Building Materials 147 (August 2017): 669–76. http://dx.doi.org/10.1016/j.conbuildmat.2017.05.001.

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4

Tebbal, Nadia, Zine El Abidine Rahmouni, and Lamis Rabiaa Chadi. "Study of the Influence of an Air-Entraining Agent on the Rheology of Motars." MATEC Web of Conferences 149 (2018): 01054. http://dx.doi.org/10.1051/matecconf/201814901054.

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The objective of this study is to analyze the effect of the air entrainment on the fresh rheological properties as well as on the compressive mechanical resistances of the mortars. The hardened concrete contains a certain amount of randomly spread air, coming either from a drive during kneading or from the evaporation of the mixing water. The air quantity is in the order of 20 l / m3, ie 2% of the volume. However, the presence of a large volume of air bubbles causes the mechanical resistances to fall in compression. On the other hand, the use of air entrainment could improve the rheological pr

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5

Sun, Zhen Ping, Dan Mei Ye, Le Feng Fu, Bo Cun Zheng, Zhong Jun Feng, and Ming Chen. "Properties of Polyacrylic Ester Latex Modified Cement Mortar." Advanced Materials Research 687 (April 2013): 166–74. http://dx.doi.org/10.4028/www.scientific.net/amr.687.166.

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The water reducing performance, retarding effect, air entrainment, flexural and compressive strength of polyacrylic ester (PAE) latex modified cement mortar were investigated with fixed flow values. The research shows that PAE latex has water-reducing performance. The amount of water used in modified cement mortar decreases with increasing dosage of PAE latex. Because of the retarding effect, PAE latex delays the hydration process of cement. PAE latex has a strong effect of air entraining, and the air content of fresh mortar can be controlled by suitable dosage of defoamer. With the same air c

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6

Zhao, Ruohong, Yubin Weng, Christopher Tuan, and An Xu. "The Influence of Water/Cement Ratio and Air Entrainment on the Electric Resistivity of Ionically Conductive Mortar." Materials 12, no. 7 (2019): 1125. http://dx.doi.org/10.3390/ma12071125.

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Ionically-conductive mortar can be used for indoor radiant heating partition walls. In these applications, mortar blocks are soaked in electrolyte solutions of CuSO4. The surfaces of the block are coated with sealant and epoxy resin afterwards to prevent evaporation. The mortar block becomes a heating element due to ionic conduction if a voltage is applied to the electrodes in the block. Its electrical conductivity depends on the dispersion of the electrolyte, and hence on the porosity of the mortar. The test specimens in this study were divided into four groups according to the different air

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7

Wang, Rui, Lei Li, Wei Wang, Hong Song Wang, Yong Jing Jiang, and Da Pu Shen. "Influences and Properties of Mortar Modified by Waterborne Polyurethane Latexes." Advanced Materials Research 1129 (November 2015): 345–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.345.

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Two waterborne polyurethane latexes with different tensile strength were employed to modify mortar and the properties of mortar including air entrainment, setting behavior, compressive and flexural strength were investigated. The results show that curing methods, polymer-cement ratio and water-cement ratio have a significant impact on the compressive and flexural strength. The strength of mortar increased under dry curing condition in the range of the polymer-cement ratio from 0.005 to 0.05 (by weight) at water-cement ratio of 0.5. The hydration of the cement containing waterborne polyurethane

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8

Zuo, Shenghao, Qiang Yuan, Tingjie Huang, Zan Wang, Kai Zhang, and Jing Liu. "Rheology and air entrainment of fresh Portland cement mortars in simulated low air pressure environments." Cement and Concrete Composites 135 (January 2023): 104848. http://dx.doi.org/10.1016/j.cemconcomp.2022.104848.

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9

Łazniewska-Piekarczyk, Beata, and Janusz Szwabowski. "THE INFLUENCE OF THE TYPE OF ANTI-FOAMING ADMIXTURE AND SUPERPLASTICIZER ON THE PROPERTIES OF SELF-COMPACTING MORTAR AND CONCRETE." Journal of Civil Engineering and Management 18, no. 3 (2012): 408–15. http://dx.doi.org/10.3846/13923730.2012.698908.

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To prevent excessive air entrainment, superplasticizers (SPs) should not only be compatible with cement, but also should not create the air-entraining effect in mortar. In order to counteract excessive air entrainment, anti-foaming admixtures (AFAs) can be used to prevent the formation of air bubbles. This paper investigates the influence of the type, amount and time of introduction of AFAs on air-entrainment, rheological properties and workability loss of self-compacting mortar. The research results prove that AFAs decrease air-content in mortar. Mortar containing an AFA does not undergo segr

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10

Chen, Xin, Xu Liu, Bo Tian, Yong Ge, and Lihui Li. "Effect of Low Atmospheric Pressure on Air Entrainment in Cement-Based Materials: An On-Site Experimental Study at Different Elevations." Materials 13, no. 18 (2020): 3975. http://dx.doi.org/10.3390/ma13183975.

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The efficiency and stability of air entrainment in concrete are sometimes found to be weaker at higher elevation. This phenomenon was attributed to the low atmospheric pressure by many researchers, however, the level of influence of atmospheric pressure on concrete air content dramatically varied among different studies. In order to clarify the effect of low atmospheric pressure on air entrainment in cement-based materials, an on-site experimental study was conducted with a rigorous control of irrelevant variables. The study focused on the air-entraining efficiency in cement paste, mortar, and

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