Vol. 15 No. 03 (2025): Tạp chí Vật liệu và Xây dựng
##common.pageHeaderLogo.altText##
Tạp chí Vật liệu & Xây dựng - Bộ Xây dựng

ISSN:

Website: www.jomc.vn

Engineering properties at early ages of pumping high-strength mortar containing various sand types

Ngọc Thành Nguyễn

Keywords:

Compressive strength
Fluidity
Early ages
Drying shrinkage
High-strength mortar

Abstract

This study mainly focused on investigating the engineering properties (i.e., fluidity, compressive strength, and drying shrinkage) at early ages of high-strength mortars using four different types of sand. The fixed composition ratios of high-strength mortars were selected, including a sand-to-cement ratio of 1.5; a silica fume-to-cement ratio of 10%; a superplasticizer-to-cement ratio of 1.5% and a water-to-cement ratio of 29%. Four types of sand with various fineness moduli (Mdl = 2.46, 3.66, 4.04, and 3.16) were selected. The results showed that the fluidity of the four fresh mortars ranged from 235 – 290 mm and the compressive strength at ages of 1, 3, and 7 d ranged from 52.1 – 58.4 MPa, 80.1 – 90.3 MPa, and 87.3 – 98.4 MPa, respectively. After aging for 7 d, the mortar samples had drying shrinkage values ​​ranging from 0.031 – 0.045% of the initial length. The use of fine aggregates with coarse grain sizes (i.e. high fineness moduli) reduced the fluidity of the fresh mortar but improved the compressive strength from 6.19 – 12.71% at 7 d and reduced the drying shrinkage up to 7 d of the hardened mortar samples. Consequently, the mortar using sand with a fineness modulus of 3.16 was proposed as the optimal one owing to its suitable fluidity for the pumping method, relatively high compressive strength (92.7 MPa at 7 d) and low drying shrinkage (0.031% at 7 d).

User Navigation

PDF (Tiếng Việt)

How to Cite

Nguyễn, N. T. (2025). Engineering properties at early ages of pumping high-strength mortar containing various sand types. Tạp Chí Vật liệu & Xây dựng - Bộ Xây dựng, 15(03), Trang 175 – Trang 182. https://doi.org/10.54772/jomc.03.2025.1023

References

  1. B. Lothenbach, K. Scrivener, R.D. Hooton, “Supplementary cementitious materials,” Cement and Concrete Research, vol. 41, 1244–1256, 2011. https://doi.org/10.1016/j.cemconres.2010.12.001.
  2. M. Sarıdemir, A. Yıldırım, “Effect of elevated temperatures on properties of high strength mortars containing ground calcined diatomite with limestone sand,” Journal of Building Engineering, vol. 56, 104748, 2022. https://doi.org/10.1016/j.jobe.2022.104748.
  3. R. Vandhiyan, T.J. Vijay, M. Manoj Kumar, “Effect of fine aggregate properties on cement mortar strength,” Materials Today: Proceedings, vol. 37, Part 2, pp. 2019–2026, 2021. https://doi.org/10.1016/j.matpr.2020.07.498.
  4. M. Heikal, O. Al-Duaij, N. Ibrahim, “Microstructure of composite cements containing blast-furnace slag and silica nano-particles subjected to elevated thermally treatment temperature,” Construction and Building Materials, vol. 93, pp. 1067–1077, 2015. https://doi.org/10.1016/j.conbuildmat.2015.05.042.
  5. M. Hu, Z. Jia, X. Jia, J. Yu, Q. Han, “Behavior deterioration and compressive model of high-strength mortar subjected to coupling freeze-thaw cycles and sulfate attack,” Journal of Building Engineering, vol. 107, 112788, 2025. https://doi.org/10.1016/j.jobe.2025.112788.
  6. J.H. Kim, S.H. Han, B.I. Choi, “Influence of pumping pressure on the viscosity curve and rheological stability of mortar incorporating polycarboxylate,” Cement and Concrete Composites, vol. 105, 103419, 2020. https://doi.org/10.1016/j.cemconcomp.2019.103419.
  7. J. Plank, E. Sakai, C.W. Miao, C. Yu, J.X. Hong, “Chemical admixtures-chemistry, applications and their impact on concrete microstructure and durability,” Cement and Concrete Research, vol. 78, pp. 81–99, 2015. https://doi.org/10.1016/j.cemconres.2015.05.016.
  8. Bộ Khoa học và công nghệ, “TCVN 2682 : 2020 Xi măng Poóc Lăng - Yêu cầu kỹ thuật,” 17 trang, 2020.
  9. American Society for Testing and Materials (ASTM) International, “ASTM C1240 Standard specification for silica fume used in cementitious mixtures,” 7 trang, 2020.
  10. Bộ Khoa học và công nghệ, “TCVN 4506:2012 Nước cho bê tông và vữa – Yêu cầu kỹ thuật,” 17 trang, 2012.
  11. Bộ Khoa học và công nghệ, “TCVN 7570 : 2006 Cốt liệu cho bê tông và vữa – Yêu cầu kỹ thuật,” 14 trang, 2006.
  12. American Society for Testing and Materials (ASTM) International, “ASTM C230/C230M Standard specification for flow table for use in tests of hydraulic cement,” 7 trang, 2020.
  13. Bộ Khoa học và công nghệ, “TCVN 3121-3 : 2022 Vữa xây dựng – Phương pháp thử - Phần 3: Xác định độ lưu động của vữa tươi (phương pháp bàn dằn),” 7 trang, 2022.
  14. Bộ Khoa học và công nghệ, “TCVN 3121-11 : 2022 Vữa xây dựng – Phương pháp thử - Phần 11: Xác định cường độ uốn và nén của vữa đã đóng rắn,” 9 trang, 2022.
  15. American Society for Testing and Materials (ASTM) International, “ASTM C490 Standard practice for use of apparatus for the determination of length change of hardened cement paste, mortar, and concrete,” 5 trang, 2021.
  16. L.K. Gupta, A.K. Vyas, “Impact on mechanical properties of cement sand mortar containing waste granite powder,” Construction and Building Materials, vol. 191, pp. 155–164, 2018. https://doi.org/10.1016/j.conbuildmat.2018.09.203.
  17. N.U. Kockal, “Investigation about the effect of different fine aggregates on physical, mechanical and thermal properties of mortars,” Construction and Building Materials, vol. 124, pp. 816–825, 2016. https://doi.org/10.1016/j.conbuildmat.2016.08.008.
  18. American Concrete Institute, “ACI 209R-92, Prediction of creep, shrinkage and temperature effects in concrete structures,” 1997. doi:10.1201/9780203882955.ch168.
  19. K.I.S.A. Kabeer, A.K. Vyas, “Utilization of marble powder as fine aggregate in mortar mixes,” Construction and Building Materials, vol. 165, pp. 321–332, 2018. https://doi.org/10.1016/j.conbuildmat.2018.01.061.