Use of pumice aggregate in cementitious rheoplastic lightweight concrete

Year 2023, Volume: 8 Issue: 1, 57 - 65, 31.03.2023

Lütfullah Gündüz , Şevket Onur Kalkan

https://doi.org/10.47481/jscmt.1214086

Abstract

Rheoplastic lightweight concrete (RLC) is generally designed for pumping applications as fluid
concrete free from segregation. Concrete is produced using polymeric admixtures to enhance
concrete workability, strength, drying shrinkage, and durability. This research investigated the
suitability of natural porous pumice aggregates in Turkey to obtain rheoplastic lightweight
concrete with cement content in normal ranges. To produce and experience rheoplastic concrete mix design data, rheoplastic lightweight concrete mixes were tested with fine pumice
aggregate (FPA) and coarse pumice aggregate (CPA) supplied from the Nevşehir region of
Turkey. For rheoplastic lightweight concrete with cement contents in the 250 to 400 kg/m3
range, the percentage of fine pumice aggregates required was in the 73.6-81.0% range with
complimentary water/cement ratios of between 0.53 and 0.68. The upper compressive strength
limit was circa 30 N/mm2
. The research findings determined that the rheoplastic concrete samples with pumice aggregate met the design requirement of a slump value of 200 mm for fresh
concrete predicted for fluid concrete forms. While technical properties of hardened concrete
such as oven-dry density (1198-1362 kg/m3
), strength values, static elasticity modulus (9236-
10756 MPa), thermal expansion coefficient (5.354 x10-6/°C - 6.929x10-6/°C) and thermal conductivity value (0.405-0.619 W/mK) decrease with increasing aggregate/cement ratios, they
increase with increasing cement dosage. In addition, the high amount of fine pumice in concrete composition results in lower drying shrinkage and wetting expansion with decreasing
cement dosage. The technical findings showed that RLC might be produced by using a superplasticizer and air-entraining admixtures and mixtures of different sizes of pumice aggregates.

Keywords

Pumice, fluid concrete, lightweight aggregate, polymer, mixture proportioning

References

• [1] Haque, M. N., Al-Khaiat, H., & Kayali, O. (2004). Strength and durability of lightweight concrete. Cement and Concrete Composites, 26(4), 307–314. [CrossRef]
• [2] Arkhipkina, O., Schuler, B., & Stipetic, M. (2019). Impact of the pumping process on the properties of lightweight concrete. In IOP Conference Series: Ma terials Science and Engineering, 615, Article 012015. [CrossRef]
• [3] LECA (2022). Structural lightweight concrete with expanded clay laterlite, Laterlite, Milano, Italy. Available at: www.leca.it Accessed on Feb 08, 2023.
• [4] Brown, B. J. (1990). Report on concrete mix design for structural concrete using yali pumice coarse and fine aggregates, Report No: 89/3408E/3379, STATS Scotland Ltd.
• [5] EuroLightCon (2000). Pumping of lightweight ag gregate concrete based on expanded clay in Europe, European Union – Brite EuRam III, Economic De sign and Construction with Light Weight Aggregate Concrete, Document BE96-3942/R11, March.
• [6] ESCSI. (2022). Pumping structural lightweight con crete produced with stalite lightweight aggregate - the team approach. A tecnical Document by Expanded Shale, Clay and Slate Institute. Available at: www. escsi.org Accessed on Feb 08, 2023.
• [7] ACI. (2018). Guide to selecting proportions for pump able concrete, first printing. August 2018, American Concrete Institude, Reported by ACI Committee 21, ACI 211.9R-18.
• [8] Sekhavati, P., Jafarkazemi, M., & Kaya, Ö. (2019). Investigating durability behavior and compressive strength of lightweight concrete containing the na no-silica and nano lime additives in the acid envi ronment. Journal of Civil Engineering and Materials Application, 3(2), 109–117.
• [9] Rossignolo, J. A., & Agnesini, M. V. (2004). Dura bility of polymer-modified lightweight aggregate concrete. Cement and Concrete Composites, 26(4), 375–380. [CrossRef]
• [10] RHEOBUILD 855. (2022). BASF Construction chemicals. 05/2000 BASF_CC-UAE. Available at: https://www.alwahapainting.com Accessed on Feb 08, 2023.
• [11] Ohama, Y. (1998). Polymer-based admixtures. Ce ment and Concrete Composites, 20(2-3), 189–212. [CrossRef]
• [12] Fowler, D. W. (1999). Polymers in concrete: a vision for the 21st century. Cement and Concrete Compos ites, 21(5-6), 449–452. [CrossRef]
• [13] ASTM C260/C260M-10a, (2016). Standard speci fication for air-entraining admixtures for concrete. West Conshohocken, PA 19428-2959. United States.
• [14] ASTM C494/C494M – 13. (2013). Standard spec ification for chemical admixtures for concrete. West Conshohocken, PA 19428-2959. United States.
• [15] Holm, T. A. (1980). Physical properties of high strength lightweight aggregate concretes. In Second International Congress of Lightweight Concrete. The Concrete Society, The Construction Press, Lances ter, UK, pp.187-204.
• [16] ASTM C191-13, (2013). Standard test methods for time of setting of hydraulic cement by vicat needle. West Conshohocken, PA 19428-2959. United States.
• [17] TS EN 1097-6. (2022). Agregaların mekanik ve fizik sel özellikleri için deneyler - Bölüm 6: Tane yoğun luğunun ve su emme oranının tayini.
• [18] TS EN 1097-3. (1999). Agregaların fiziksel ve me kanik özellikleri için deneyler bölüm 3: Gevşek yığın yoğunluğunun ve boşluk hacminin tayini.
• [19] TS 699. (2009). Natural building stones - Methods of inspection and laboratory testing. Turkish Standards Institution, Ankara, Türkiye.
• [20] ALFAPLAST SP870(M). (2022). Alfalahchemicals. Available at: http://www.alfalahchemicals.com/al falah/products/water-reducer-plasticizer/ Accessed on Feb 08, 2023.
• [21] EMACO S88C (Thixotropic). (2022). BASF Con struction Chemicals. Available at: http://www.izo gun.com/TR/dosya/1-660/h/emaco-s88c.pdf Ac cessed on Feb 08, 2023.
• [22] Micro Air. (2007). BASF Construction Chemicals. LLC, LIT # 1017034.
• [23] Eguchi, K., Teranishi, K., Nakagome, A., Kishimo to, H., Shinozaki, K., & Narikawa, M. (2007). Ap plication of recycled coarse aggregate by mixture to concrete construction. Construction and Building Materials, 21(7), 1542–1551. [CrossRef]
• [24] Teo, D. C. L., Mannan, M. A., Kurian, V. J., & Ga napathy, C. (2007). Lightweight concrete made from oil palm shell (OPS): Structural bond and durability properties. Building and Environment, 42(7), 2614– 2621. [CrossRef]
• [25] Evangelista, L., & De Brito, J. (2007). Mechanical behaviour of concrete made with fine recycled con crete aggregates. Cement and Concrete Composites, 29(5), 397–401. [CrossRef]
• [26] TS EN 12390-5. (2019). Testing hardened concrete - Part 5: Flexural strength of test specimens. Turkish Standards Institution, Ankara, Türkiye.
• [27] TS EN 12350-2. (2019). Testing fresh concrete - Part 2: Slump test. Turkish Standards Institution.
• [28] Failla, A., Mancuso, P., Miraglia, N., & Ruisi, V. (1997). Experimentaltheoretical study on pumice aggregate lightweight concrete (pp. 3-22). Technical Report, The Instuto di Scienza delle Costrurioni, Facolta di Ingegneria, Palermo, Italy, pp. 3–16.
• [29] Han, S. H., & Kim, J. K. (2004). Effect of temperature and age on the relationship between dynamic and static elastic modulus of concrete. Cement and Con crete Research, 34(7), 1219–1227. [CrossRef]
• [30] ACI Committee 213. (1970). Guide for structural lightweight aggregate concrete, American Concrete Institute, Committee 213 Report, Paris.
• [31] Gündüz, L., & Uğur, İ. (2005). The effects of different fine and coarse pumice aggregate/cement ratios on the structural concrete properties without using any admixtures. Cement and Concrete Research, 35(9), 1859–1864. [CrossRef]
• [32] Bardhan-Roy, B. K. (1980). Design considerations for prestressed lightweight aggregate concrete. In ternational Journal of Cement Composites and Light weight Concrete, 2(4), 171–184. [CrossRef]
• [33] Kornev, N. A., Kramar, V. G., & Kudryavtsev, A. A. (1980). Design peculiarities of prestressed supporting constructions from concretes on porous aggregates (pp.141–151). The Concrete Society, The Constitu tion Press.