กำลังอัด การดูดซึมน้ำ และปริมาณช่องว่างของมอร์ต้าร์เบาที่ใช้ หินพัมมิซแทนที่มวลรวมในปริมาณสูง

Krit  Pomsona; Pattarapon  Wongthong; Woramin  Manpansa; Saofee Dueramae

Authors

Krit Pomsona Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Krungthep, Krung Thep Maha Nakhon 10120
Pattarapon Wongthong Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Krungthep, Krung Thep Maha Nakhon 10120
Woramin Manpansa Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Krungthep, Krung Thep Maha Nakhon 10120
Saofee Dueramae Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Krungthep, Krung Thep Maha Nakhon 10120

Keywords:

Pumice stone, Lightweight mortar, Compressive strength, Water absorption, Voids

Abstract

The purpose of this research is to study the possibility of using high level of pumice stone as aggregate to produce lightweight mortar. The aggregate was replaced with pumice stone at 0, 50, 75 and 100 %wt. The water requirement, compressive strength, water absorption and voids of mortar were evaluated. The results show that water requirement of mortar was increased with increasing in pumice stone. The W/C ratio of the mortar using pumice stone were 1.18 to 1.54, while control mortar was 0.64. The compressive strength of the mortar decreased with an increase in level of pumice stone. The using pumice stones at 50% resulted in the highest compressive strength. The PS50 mortar had compressive strengths of 112.2, 172.0 and 178.7 ksc at ages 7, 28 and 60 days, respectively and can be used for lightweight structures according to ACI 213 standards. The used of pumice stone as aggregate had a significant effect on reducing unit weight of mortar. This due to pumice stone had low specific gravity. The water absorption increased with an increase in pumice stone and was directly related to voids.

References

M. R. Ali, M. Maslehuddin, M. Shameem, and M. S. Barry, “Thermal-resistant lightweight concrete with polyethylene beads as coarse aggregates,” Construction and Building Materials, vol. 164, pp. 739–749, March 2018.

F. A. Shaikh, P. Nath, A. Hosan, M. John, and W. K. Biswas, “Sustainability assessment of recycled aggregates concrete mixes containing industrial by-products,” Materials Today Sustainability, vol. 5, 100013, September 2019.

M. J. Shannag, A. Charif and S. Dghaither, “Developing structural lightweight concrete using volcanic scoria available in Saudi Arabia,” Arabian Journal for Science and Engineering, vol. 39, pp. 3525–3534, May 2014.

M. A. Idi, A. S. Abdulazeez, S. A. Usman and T. Justin, “Strength Properties of Concrete Using Pumice Aggregate As Partial Replacement of Coarse Aggregate,” International Journal of Engineering Applied Sciences and Technology, vol. 4, no. 11, pp. 519–525, March 2020.

S. Dueramae, S. Sanboonsiri, T. Suntadyon, B. Aoudta, W. Tangchirapat, P. Jongpradist, T. Pulngern. P. Jitsangiam and C. Jaturapitakkul, “Properties of lightweight alkali activated controlled Low-Strength material using calcium carbide residue–Fly ash mixture and containing EPS beads,” Construction and Building Materials, vol. 297, 123769, August 2021.

K. M. A. Hossain, “Properties of volcanic pumice based cement and lightweight concrete,” Cement and concrete research, vol. 34, no. 2, pp. 283–291, February 2004.

R. Şahin, R. Demirboğa, H. Uysal, and R. Gül, “The effects of different cement dosages, slumps and pumice aggregate ratios on the compressive strength and densities of concrete,” Cement and Concrete Research, vol. 33, no. 8, pp. 1245–1249, August 2003.

H. Ö. Öz, “Properties of pervious concretes partially incorporating acidic pumice as coarse aggregate,” Construction and building Materials, vol. 166, pp. 601-609, March 2018.

M. Golias, J. Castro, and J. Weiss, “The influence of the initial moisture content of lightweight aggregate on internal curing,” Construction and Building Materials, vol. 35, pp. 52-62, October 2012.

Standard Specification for Concrete Aggregates, ASTM C33/C33M-18, 2018.

Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens), ASTM C109/C109M-16a, 2016.

Testing concrete. Method for determination of water absorption, BS 1881-122, 2011.

K. M. A. Hossain, S. Ahmed, and M. Lachemi, “Lightweight concrete incorporating pumice based blended cement and aggregate: Mechanical and durability characteristics,” Construction and Building Materials, vol. 25, no. 3, pp. 1186–1195, March 2011.

P. Lura, D. P., Bentz, D. A. Lange, K. Kovler, A. Bentur, and K. Van Breugel, “Measurement of water transport from saturated pumice aggregates to hardening cement paste,” Materials and Structures, vol. 39, pp. 861–868, November 2006.

R. Henkensiefken, J. Castro, D. Bentz, T. Nantung, and J. Weiss, “Water absorption in internally cured mortar made with water-filled lightweight aggregate,” Cement and Concrete Research, vol. 39, no. 10, pp. 883–892, October 2009.

M. El-Hawary and A. Al-Sulily, “Internal curing of recycled aggregates concrete,” Journal of Cleaner Production, vol. 275, 122911, December 2020.

S. Zhutovsky and K. Kovler, “Influence of water to cement ratio on the efficiency of internal curing of high-performance concrete,” Construction and Building Materials, vol. 144, pp. 311-316, July 2017.

L. Gündüz, “The effects of pumice aggregate/cement ratios on the low-strength concrete properties,” Construction and Building Materials, vol. 22, no. 5, pp. 721–728, May 2008.

ACI 213 : Structural Lightweight-Aggregate Concrete, ACI 213, 2014.