scholarly journals ENGINEERING CHARACTERIZATION OF STRENGTH AND ELASTIC PROPERTIES OF GEOPOLYMER CEMENT CONCRETE MATERIALS

2015 ◽  
Vol 10 (4) ◽  
pp. 87-106
Author(s):  
Brett Tempest ◽  
Janos Gergely ◽  
David C. Weggel
Keyword(s):  
Portland Cement ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Creep Properties ◽  
Shrinkage And Creep ◽  
Geopolymer Cements ◽  
Geopolymer Cement ◽  
Concrete Materials

Geopolymer cements provide an alternative to the Portland cement used to produce structural concrete. In this study, geopolymer cements were used to create concrete having compressive strength in the range of 34 to 83 MPa (5,000–12,000 psi). The mechanical properties of these concrete materials were evaluated to determine the compressive and tensile strengths and immediate and long term elastic behaviors. The geopolymer cement concrete (GCC) was found to perform in a similar manner to Portland cement concrete (PCC). Long term shrinkage and creep properties of GCC materials were found to be lower than the values typical for PCC.

scholarly journals Structural analysis of composite metakaolin-based geopolymer concrete

2018 ◽  
Vol 11 (3) ◽  
pp. 535-543 ◽  
Author(s):  
F. PELISSER ◽  
B. V. SILVA ◽  
M. H. MENGER ◽  
B. J. FRASSON ◽  
T. A. KELLER ◽  
...  
Keyword(s):  
Portland Cement ◽  
Concrete Beam ◽  
Rupture Strength ◽  
Geopolymer Concrete ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Two Samples ◽  
Geopolymer Cements ◽  
Geopolymer Cement ◽  
Nonlinear Numerical Model

Abstract The study of alternative binders to Portland cement, such as geopolymer cements, offers the chance to develop materials with different properties. With this purpose, this study evaluated experimentally the mechanical behavior of a geopolymer concrete beam and compared to a Finite Element (FE) nonlinear numerical model. Two concrete beams were fabricated, one of Portland cement and another of metakaolin-based geopolymer cement. The beams were instrumented with linear variable differential transformers and strain gauges to measure the deformation of the concrete and steel. Values for the compressive strength of the geopolymer cement concrete was 8% higher than the Portland cement concrete (55 MPa and 51 MPa, respectively) and the tensile rupture strength was also 8% higher (131 kN) for the geopolymer concrete beam in relation to Portland cement concrete beam (121 kN). Distinct failure mechanisms were verified between the two samples, with an extended plastic deformation of the geopolymer concrete, revealing post-fracture toughness. The geopolymer concrete showed higher tensile strength and better adhesion in cement-steel interface.

scholarly journals Long-term use of modern Portland cement concrete: The impact of Al-tobermorite formation

2021 ◽  
Vol 198 ◽  
pp. 109297
Author(s):  
Ippei Maruyama ◽  
Jiří Rymeš ◽  
Abudushalamu Aili ◽  
Shohei Sawada ◽  
Osamu Kontani ◽  
...  
Keyword(s):  
Portland Cement ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
The Impact

Long-term leaching of toxic trace metals from Portland cement concrete

1999 ◽  
Vol 29 (4) ◽  
pp. 515-521 ◽  
Author(s):  
S.R. Hillier ◽  
C.M. Sangha ◽  
B.A. Plunkett ◽  
P.J. Walden
Keyword(s):  
Trace Metals ◽  
Portland Cement ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Toxic Trace Metals

scholarly journals Investigating possibilities for using sea shell on compressive strength properties of concrete

2018 ◽  
Vol 7 (1.8) ◽  
pp. 241
Author(s):  
Kiran Kumar ◽  
Vineetha Anil ◽  
Sara Hamed ◽  
Ruwa Malik
Keyword(s):  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Strength Properties ◽  
Partial Replacement ◽  
Flexural Properties ◽  
Fine Aggregate ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Concrete Materials ◽  
Ordinary Portland Cement Concrete

The reason of this attempt was to demonstrate that seashells can be utilized as a partial replacement for fine aggregate in concrete for enhancing strength properties. Since seashells are widely available everywhere in coastal and seashore areas, and some of the concrete materials cannot be found easily everywhere.  The strategies utilized as a part of this attempt was to replace burnt and crushed seashells with fine aggregate at 10%, 20% and 30% and compare it with each other and the traditional Ordinary Portland Cement concrete regarding mechanical properties following 7 and 28 days. In conclusion, despite the fact that seashells are generally accessible and can be effortlessly gathered from seashore and beach front regions, the process of burning and crushing requires a lot of energy and is tedious. In spite of the fact that the results demonstrated that utilizing 20% seashell to fine aggregate substitution has a somewhat higher in compressive and flexural properties than that of Ordinary Portland Cement concrete.

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