From micro to macro: An investigation of the geomechanical behaviour of pumice sand

2015 ◽  
pp. 45-62 ◽  
Author(s):  
R.P. Orense ◽  
M.J. Pender
Keyword(s):  
Pumice Sand

scholarly journals Geotechnical Properties of a Pumice Sand

2006 ◽  
Vol 46 (1) ◽  
pp. 69-81 ◽  
Author(s):  
M.J. Pender ◽  
L.D. Wesley ◽  
T.J. Larkin ◽  
Satyawan Pranjoto
Keyword(s):  
Geotechnical Properties ◽  
Pumice Sand

Durability of Normal and Lightweight Aggregate Mortars with Different Supplementary Cementitious Materials

2021 ◽  
Vol 17 ◽  
pp. 271-281
Author(s):  
Efstratios Badogiannis ◽  
Eirhnh Makrinou ◽  
Marianna Fount
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Lightweight Aggregate ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Granulated Blast Furnace Slag ◽  
Binder Ratio ◽  
Pumice Sand ◽  
Water To Binder Ratio ◽  
Furnace Slag

A study on the durability parameters of normal and lightweight aggregate mortars, incorporated different supplementary cementitious materials (SCM) is presented. Mortars were prepared using limestone or pumice as aggregates and Metakaolin, Fly ash, Granulated Blast Furnace Slag and Silica Fume, as SCM, that they replaced cement, at 10 % by mass. Ten different mortars, having same water to binder ratio and aggregate to cement volumetric ratio, they were compared mainly in terms of durability. The use of pumice sand was proved to be effective not only to the density of the mortars as it was expected, but also in durability, fulfilling at the same time minimum strength requirements. The addition of the different SCM further enhanced the durability of the mortars, where Metakaolin was found to be the most effective one, especially against chloride’s ingress.

scholarly journals Manufacturing and Characterization Process of Polymer Concrete with Aggregate From Pumice Stone and Corn Husk Fiber as A Filler

2019 ◽  
Vol 1 (1) ◽  
pp. 6-14
Author(s):  
Awan Maghfirah
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Epoxy Resin ◽  
Xrd Analysis ◽  
Polymer Concrete ◽  
Pumice Stone ◽  
Corn Husk ◽  
Three Samples ◽  
Pumice Sand

Research has been carried out regarding the manufacturing process of polymer concrete made from a mixture of pumice, sand (1: 1), corn husk fiber, epoxy and thinner resin. This research was conducted to determine the characterization of polymer concrete which will be tested physically and mechanically with the best composition mixture. The physical properties of polymer concrete which were analyzed namely density, porosity and water absorption; mechanical properties including impact strength, flexural strength and compressive strength, and polymer concrete microstructure analysis, namely SEM-EDX. The best results were obtained with a mixture of pumice, sand (1:1), corn husk fiber, epoxy and thinner resin. The result are as stated here, density: 1.84 g/cm3 with composition (49:49:2) 30 g epoxy resin, porosity : 0.44% with composition (50:50:0) 20 g epoxy resin, water absorption: 1.8% with composition (50:50:0) 25 g of epoxy resin. Whereas mechanical properties, on impact tests: 4.956 KJ/m2 with composition of (47:47:6) 25 g epoxy resin, flexural test: 22.22 MPa with composition of (45:45:0) 30 g epoxy resin, pressure test: 8.41 MPa with composition of (49:49:2) 30 g epoxy resin. XRD analysis shows that each of its constituents still have quartz, pumice, quartz, pumice-shaped hexagonal crystals, while corn husk fibers are amorphous crystals. The average sound absorption coefficient for the three samples (20%, 25%, and 30%) are 0.178; 0.152; and 0.234 at a frequency of 500 Hz - 6300 Hz, which meets the requirements of ISO 11654 and ASTM C.384.

Observations on microstructure of pumice particles using computed tomography

2013 ◽  
Vol 50 (11) ◽  
pp. 1109-1117 ◽  
Author(s):  
Naotaka Kikkawa ◽  
Rolando P. Orense ◽  
Michael J. Pender
Keyword(s):  
Computed Tomography ◽  
Standard Method ◽  
Ct Scanning ◽  
Solid Density ◽  
Unique Material ◽  
X Ray Computed ◽  
Pumice Sand ◽  
Almost All ◽  
Finger Pressure

Pumice occurs widely in New Zealand and is important in infrastructure construction, but is not readily characterized in situ. It is a unique material, the particles of which crush easily under finger pressure, making it arguably the most delicate of the suite of crushable soils found in various locations around the world. In this study, we scanned pumice particles of different sizes using an X-ray computed tomography (CT) scanning machine to investigate particle microstructure. Using image analyses, we were able to determine the solid density of pumice more accurately than the standard method, which showed increasing density as particle size decreased. Results from the CT scanning showed a solid density of about 2.2 g/cm3, which is similar to the highest value obtained using the standard method. On the other hand, the apparent density from CT scanning was 0.89 g/cm3, which is lower than the density of water, therefore confirming that almost all pumice particles float on water. In addition, the volume of surface voids was observed to be much greater than that of internal voids. Moreover, the particle shape of pumice sand was analyzed and compared to other natural sands. Finally, analyses showed that pumice particles are very fragile not only because they are porous, but also because of their angular nature.

scholarly journals Normalised behaviour of a non-plastic silt–pumice sand mixture

Géotechnique ◽  
2020 ◽  
Vol 70 (9) ◽  
pp. 822-832
Author(s):  
Lu Zuo ◽  
Beatrice A. Baudet
Keyword(s):  
Sand Mixture ◽  
Pumice Sand

Obtaining alkali glass fiber on the basis of volcanic tuff and pumice sand

1963 ◽  
Vol 20 (9) ◽  
pp. 479-481 ◽  
Author(s):  
M. G. Manvelyan ◽  
K. G. Kalamkaryan ◽  
S. G. Malkhasyan ◽  
I. A. Vardanyan ◽  
B. I. Finkel'shtein
Keyword(s):  
Glass Fiber ◽  
Volcanic Tuff ◽  
Alkali Glass ◽  
Pumice Sand
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