Rheology and reactive testing methods for properties of cement mortars and their utilization for concrete design

Author(s):  
R. Hela
Author(s):  
David W. Stefanovsky ◽  
Luis Ruiz ◽  
R. James Rockwell
Keyword(s):  

2019 ◽  
Vol 1 (1) ◽  
pp. 24-36
Author(s):  
I Wayan Pardi ◽  
Ni Made Nadia Suta Pradhani

This study aims to analyze the background of the emergence of metal children in the Ketapang ferry port, and formulate a model that can be used to overcome the presence of metal children in the Ketapang ferry port. The method used in this study is a qualitative research method, the steps of which include determining the location of research, the method of determining informants, research instruments, data collection methods, data validity testing methods, and data analysis methods. The results showed that there were a number of factors that caused the emergence of metal children at Ketapang Port of Spread, namely 1) poverty factors, 2) family factors, 3) peer or playmate factors, and 4) education factors. Models that can be used to tackle the presence of metal children are Street-centered intervention, Family-centered intervention, Institutional-centered intervention, and Community-centered intervention.


2020 ◽  
Vol 38 (10A) ◽  
pp. 1522-1530
Author(s):  
Rawnaq S. Mahdi ◽  
Aseel B. AL-Zubidi ◽  
Hassan N. Hashim

This work reports on the incorporation of Flint and Kaolin rocks powders in the cement mortar in an attempt to improve its mechanical properties and produce an eco-friendly mortar. Flint and Kaolin powders are prepared by dry mechanical milling. The two powders are added separately to the mortars substituting cement partially. The two powders are found to improve the mechanical properties of the mortars. Hardness and compressive strength are found to increase with the increase of powders constituents in the cement mortars. In addition, the two powders affect water absorption and thermal conductivity of the mortar specimens which are desirable for construction applications. Kaolin is found to have a greater effect on the mechanical properties, water absorption, and thermal conductivity of the mortars than Flint. This behavior is discussed and analyzed based on the compositional and structural properties of the rocks powders.


Author(s):  
S.I. Murphy ◽  
D. Kent ◽  
J. Skeens ◽  
M. Wiedmann ◽  
N.H. Martin

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