Incorporation of expanded vermiculite lightweight aggregate in cement mortar

2018 ◽  
Vol 179 ◽  
pp. 302-306 ◽  
Author(s):  
Kim Hung Mo ◽  
Hong Jie Lee ◽  
Michael Yong Jing Liu ◽  
Tung-Chai Ling
Keyword(s):  
Cement Mortar ◽  
Lightweight Aggregate ◽  
Expanded Vermiculite

scholarly journals Damping Property of Cement Mortar Incorporating Damping Aggregate

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 792 ◽  
Author(s):  
Yaogang Tian ◽  
Dong Lu ◽  
Jianwei Zhou ◽  
Yuxuan Yang ◽  
Zhenjun Wang
Keyword(s):  
Mechanical Properties ◽  
Cement Mortar ◽  
Damping Ratio ◽  
Polypropylene Fiber ◽  
Lightweight Aggregate ◽  
Experimental Results ◽  
Optimal Dosage ◽  
Polymer Emulsion ◽  
Rubber Powder ◽  
Damping Property

This study proposes a new cement mortar incorporating damping aggregate (DA) and investigates the mechanical properties and damping property of the cement mortar. Four types of DA were prepared, lightweight aggregate presaturated water and three types of polymer emulsion. Further, the effects of polypropylene fiber and rubber powder on the performance of the cement mortar were studied. The experimental results showed that the damping ratio of specimens containing 70% DA was approximately three times higher than that of the reference mortar, with a slight decrease in the mechanical properties. Adding fiber was more effective than rubber powder in improving the damping ratio of the cement mortar, and the optimal dosage of fiber was 0.5%.

scholarly journals Cement-base bearing pads mortar for connections in the precast concrete: study of surface roughness

2012 ◽  
Vol 5 (1) ◽  
pp. 39-67
Author(s):  
M. K. El Debs ◽  
E.K. Bellucio
Keyword(s):  
Surface Roughness ◽  
Portland Cement ◽  
Modulus Of Elasticity ◽  
Cement Mortar ◽  
Precast Concrete ◽  
Lightweight Aggregate ◽  
Short Fibers ◽  
Low Modulus ◽  
Precast Elements ◽  
Styrene Butadiene

Bearing pads are used in precast concrete connections to avoid concentrated stresses in the contact area between the precast elements. In the present research, the bearing pads are Portland cement mortar with styrene-butadiene latex (SB), lightweight aggregate (expanded vermiculite-term) and short fibers (polypropylene, glass and PVA), in order to obtain a material with low modulus of elasticity and high tenacity, compared with normal Portland cement mortar. The objective of this paper is to analyze the influence of surface roughness on the pads and test other types of polypropylene fibers. Tests were carried out to characterize the composite and test on bearing pads. Characterization tests show compressive strength of 41MPa and modulus of elasticity of 12.8GPa. The bearing pads tests present 30% reduction of stiffness in relation to a reference mortar. The bearing pads with roughness on both sides present a reduction up to 30% in stiffness and an increase in accumulated deformation of more than 120%, regarding bearing pads with both sides smooth.

scholarly journals Foam glass from municipal waste as a lightweight aggregate for cement mortar

2019 ◽  
Vol 351 ◽  
pp. 012008
Author(s):  
D Wattanasiriwech ◽  
S Nontachit ◽  
P Manomaivibool ◽  
S Wattanasiriwech
Keyword(s):  
Cement Mortar ◽  
Foam Glass ◽  
Lightweight Aggregate ◽  
Municipal Waste

Changes of Mechanical Properties of Lightweight Cement Mortar Mixed with Recycled Expanded Polystyrene and Subjected to High Temperatures

2014 ◽  
Vol 1051 ◽  
pp. 752-756 ◽  
Author(s):  
Rocío Sancho ◽  
Ángel Castillo ◽  
Ma Eugenia Maciá ◽  
Rosa Corral
Keyword(s):  
Mechanical Properties ◽  
High Temperatures ◽  
Mechanical Response ◽  
Cement Mortar ◽  
Construction Materials ◽  
Lightweight Aggregate ◽  
Expanded Polystyrene ◽  
Partial Replacement ◽  
Different Temperatures ◽  
Residual Product

The main aim of this paper is to evaluate the influence of the recycled expanded polystyrene as lightweight aggregate on the mechanical properties of lightweight cement mortar when subjected to high temperatures.Various tests have been carried out on different mixtures of mortar. The water/cement mix proportion has always been the same and only the nature of the aggregates has changed, with a partial replacement of the conventional aggregate by recycled ground EPS (EPS-G) with values ranging from 10% to 30%, achieving significant results in relation to exposure to high temperatures. In this research, the samples have been subjected to different temperatures of exposure, in order to analyze the influence of the lightweight recycled arid dosage in the mechanical properties of mortars.The results of this study show the ability of mechanical response at high temperatures with light mortars EPS-G. This study shows how this new mix can be used in different building types, optimizing construction materials and reducing mortars density while transforming a residual product into an active product.

The Properties of Repair Cement Mortar with Insulation Performance under the Composite Deterioration Conditions

2011 ◽  
Vol 261-263 ◽  
pp. 98-103
Author(s):  
Se Hun Jeon ◽  
Myong Shin Song ◽  
Hyun Ju Kang ◽  
Young Jin Song
Keyword(s):  
Diffusion Coefficient ◽  
Temperature Change ◽  
Concrete Structure ◽  
Bending Strength ◽  
Cement Mortar ◽  
Lightweight Aggregate ◽  
Water Durability ◽  
Restorative Materials ◽  
Alumino Silicate ◽  
Insulation Performance

In this study, we studied on the durability of restorative cement mortar for deteriorated concrete at complex deteriorated conditions as variation of temperature and of humidities. We made a comparison between restorative materials with insulation function and restorative materials without insulation function in items of compressive and bending strength and permeability of water, durability for carbonation, salt damage, diffusion coefficient of salt at complex deterioration conditions like change of temperature, change of humidity, For insulation, we used close-pore type Alumino-Silicate lightweight aggregate and substituted 12 wt% and 15 wt% out of original restorative cement mortar without insulation function.As a result, it was found that original restorative cement mortar without insulation function fail to meet Korean Standard on polymer modified cement mortar for maintenance in concrete structure, but restorative cement mortar with insulation function is in contentment Korean Standard to meet excellent than restorative materials without insulation function for durability at complex deteriorated conditions.

Surface Properties of Lightweight Aggregate Concrete and its Correlation with Durability

2015 ◽  
Vol 812 ◽  
pp. 207-212 ◽  
Author(s):  
Rita Nemes
Keyword(s):  
Compressive Strength ◽  
Abrasion Resistance ◽  
Cement Mortar ◽  
Gas Permeability ◽  
Concrete Strength ◽  
Lightweight Aggregate ◽  
Lightweight Aggregate Concrete ◽  
Conventional Concrete ◽  
Aggregate Concrete ◽  
Mortar Matrix

Durability is one of most important requirements of concrete design. From this aspect is arising the required minimal compressive strength class of conventional concrete in order to ensure durability. The porosity of cement mortar matrix and consequently the liquid and gas permeability of concrete may be reduced. But the strength of lightweight aggregate concrete depends primarily on the crushing resistance of lightweight aggregate (LWA). With low strength LWA may be achieved higher concrete strength by high strength cement mortar matrix. Therefore we can not consider durability simply on the basis of the compressive strength of concrete. The most important durability factors are closely related to the porosity and strength of the cement mortar matrix but for example the abrasion resistance depends more significantly on the aggregate type. Lightweight aggregates usually do not have high abrasion resistance, but they can be advantageous in case of restoration of bridge pavement. The most important factors of durability regarding pavements are frost scaling and abrasion resistance. These parameters (especially abrasion resistance) are not available in the literature when using LWA.

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