TY - JOUR
T1 - Factors affecting the strength of structural lightweight aggregate concrete with and without fibers in the 1,200–1,600 kg/m3 density range
AU - Suraneni, Prannoy
AU - Bran Anleu, Paula C.
AU - Flatt, Robert J.
N1 - Funding Information:
The authors wish to thank Alexandre Bauer, Sarah Gaillard, Timothy Hafen, Damian L?thi, Andrea Korell, and Marc Schultheiss for performing several of the experiments reported here in various student projects at ETH Z?rich. Heinz Richner is also thanked for extensive support in the concrete lab at ETH Z?rich. Lorenzo Boccadoro, Eike Klingsch, Prof. Mario Fontana, and Prof. Andrea Frangi from ETH Z?rich are thanked for help with the overall project and for fruitful and interesting discussions. Arnd Eberhardt from Sika AG is thanked for the design of the modified F?ller curve. Erne AG is thanked for providing material and financial support.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Concrete compressive strength decreases significantly with decreasing density and therefore, there are few examples of structural grade concretes with densities below 1,600 kg/m3. Here we show the development of structural lightweight aggregate concrete in the 1,200–1,600 kg/m3 density range. Compressive strengths of up to 36 MPa are obtained at 28 days. By using fibers, mixes with flexural strengths of up to 7 MPa and high ductility in flexure are obtained at 28 days. These results are significantly better than those in existing literature at comparable densities. Compressive strength of lightweight concrete depends on both paste and aggregate properties, while the flexural strength depends mostly on the volume fraction of fibers used.
AB - Concrete compressive strength decreases significantly with decreasing density and therefore, there are few examples of structural grade concretes with densities below 1,600 kg/m3. Here we show the development of structural lightweight aggregate concrete in the 1,200–1,600 kg/m3 density range. Compressive strengths of up to 36 MPa are obtained at 28 days. By using fibers, mixes with flexural strengths of up to 7 MPa and high ductility in flexure are obtained at 28 days. These results are significantly better than those in existing literature at comparable densities. Compressive strength of lightweight concrete depends on both paste and aggregate properties, while the flexural strength depends mostly on the volume fraction of fibers used.
KW - Compressive strength
KW - Fibers
KW - Flexural strength
KW - Lightweight aggregate concrete
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U2 - 10.1617/s11527-015-0529-2
DO - 10.1617/s11527-015-0529-2
M3 - Article
AN - SCOPUS:84921341670
VL - 49
SP - 677
EP - 688
JO - Materiaux et constructions
JF - Materiaux et constructions
SN - 1359-5997
IS - 1-2
ER -