scholarly journals Express Forecast of Portland Cement Strength Using Conductimetric and Thermogravimetric Analyses

2018 ◽  
Vol 463 ◽  
pp. 042021
Author(s):  
Yu.V. Yefimenko
Keyword(s):  
Portland Cement ◽  
Thermogravimetric Analyses ◽  
Cement Strength

scholarly journals Maximizing the Sustainability of Cement Utilization in Building Projects through the Use of Greener Materials

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Mark Bediako ◽  
Charles Dela Adobor ◽  
Eric Opoku Amankwah ◽  
Kofi Nyako ◽  
Charles Kwame Kankam
Keyword(s):  
Portland Cement ◽  
Construction Industry ◽  
Laboratory Tests ◽  
Negative Impact ◽  
Building Projects ◽  
Strength Performance ◽  
Setting Times ◽  
Curing Period ◽  
Cement Strength ◽  
Wide Awake

Greener technologies and sustainable developments are currently among the main tools used by many industries in shaping the world for a better future. The construction industry that is known to have numerous negative impact on sustainability is now wide awake on sustainable measures which can aid in reducing its negative impact. In this work, green cement was produced from pyroprocessed clay (PC) at 800°C and mixed together with Portland cement. This paper presents both laboratory tests and some field applications of green cement application. Laboratory tests performed included setting times, compressive strength, and shrinkage. Field applications of the green cement are shown. Results from the work showed that well-proportioned greener cement gained strengths between 11% and 30% more than Portland cement at standard curing period of 3, 7, 14, and 28 days. However, in real statistical terms, there was no difference between Portland cement and green cement strength performance. Shrinkage from both total and autogenous tests also showed insignificant differences between the two cements. The study recommends the use of green cements with pozzolanic origin than only Portland cement as a way to maximize sustainability in building projects.

Effect of silica fume fineness on the improvement of Portland cement strength performance

2015 ◽  
Vol 96 ◽  
pp. 55-64 ◽  
Author(s):  
Miguel Ángel Sanjuán ◽  
Cristina Argiz ◽  
Jaime C. Gálvez ◽  
Amparo Moragues
Keyword(s):  
Portland Cement ◽  
Silica Fume ◽  
Strength Performance ◽  
Cement Strength

Prediction of Portland Cement Strength Using Statistical Methods

2007 ◽  
Vol 22 (3) ◽  
pp. 333-336 ◽  
Author(s):  
P. E. García-Casillas ◽  
C. A. Martinez ◽  
H. Camacho Montes ◽  
A. García-Luna
Keyword(s):  
Portland Cement ◽  
Statistical Methods ◽  
Cement Strength

Research on the Properties of Composite Portland Cement with High Volume of Industry Waste

2013 ◽  
Vol 575-576 ◽  
pp. 319-322
Author(s):  
Bao Li Du ◽  
Xing Hua Fu ◽  
Wen Hong Tao ◽  
Xin Jin
Keyword(s):  
Portland Cement ◽  
High Volume ◽  
Optimum Combination ◽  
National Standard ◽  
Hydration Products ◽  
Industry Waste ◽  
Hydration Mechanism ◽  
Orthogonal Experiments ◽  
Cement Mixture ◽  
Cement Strength

The paper studied the influences of some industry wastes on the properties of composite Portland cement. Different amount of wastes were added as cement mixture. Through the investigation of properties of cement by orthogonal experiments, the optimum combination was obtained. The hydration products were analyzed by XRD and SEM. Its hydration mechanism was investigated and the result shows that with appropriate ration of each influencing factors, the cement could meet the national standard 42.5MPa of cement strength.

scholarly journals The temperature effect on portland cement strength

2019 ◽  
Vol 221 ◽  
pp. 01002
Author(s):  
Yurii Abzaev ◽  
Aleksei Gnyrya ◽  
Sergei Korobkov ◽  
Danil Dudov ◽  
Dmitrii Mihailov ◽  
...  
Keyword(s):  
Portland Cement ◽  
Young’S Modulus ◽  
Solid Phase ◽  
Young's Modulus ◽  
Pore Space ◽  
Predictive Modelling ◽  
Main Reaction ◽  
Reaction Products ◽  
Experimental Values ◽  
Cement Strength

The paper presents the results of predictive modelling of the curing mechanism of the type CEM I 42.5B Portland cement using the VCCTL tool. The cement curing is studied during 28 days within the 0–99 оС temperature range. It is shown that the degree of Portland cement hydration is ~0.55 at 10 оС, and with the temperature increase the hydration process substantially intensifies. The hydration degree of 0.75 is achieved after 50 hours at a temperature over 90 оС. The VCCTL modelling is used to determine the quantitative content of the initial minerals and the main reaction products calcium silicate hydrate comprising C-S-H and portlandite (CH). Their total amount significantly grows during the indicated time period. In Portland cement, the amount of clinker minerals decreases, whereas the fraction of hydrated cement comprising C-S-H and CH achieves 0.70 of the solid phase and pore space. The temperature has a great effect on these processes. The pore space reduces with the increasing time and temperature. It is found that the effective elastic moduli of Portland cement rapidly grow during 400 hours and achieve the following values: 16.79 MPa for the bulk modulus, 8.90 MPa for the shear modulus and 22.69 MPa for Young’s modulus. The equivalence of the VCCTL modelling of cement curing is examined by a search for the correlation between the experimental values of the yield stress at 20, 40, 50 and 70 оС and Young’s modulus. With a high degree of reliability, this correlation matches the cubic function which is in agreement with the literature data.

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