Hempcrete using Cement and Gypsum Plaster as a Binder

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Prachoom Khamput


This research aims to develop a lightweight concrete block product (hempcrete) using Portland cement and plaster gypsum plaster as a binder. The ratio of cement to gypsum plaster to fine sand to tap water equal 1: 1: 1: 1 by weight was kept in this experiment. The crushed hemp hurd was mixed through a 6 mm sieve at 0, 2, 4, 6, 8, and 10% of the total ingredients. The 15 x 15 x 15 cm hempcrete samples were mixed and formed, and the samples were cured for 7, 14, 21 and 28 days. Density, water absorption and compressive strength were investigated according to BS 1881: Part 108. The results showed that the hemp hurd was mixed in larger quantities, the density and compressive strength tended to decrease while the water absorption tended to increase accordingly. The amount of 6% by weight of hemp hurd is suitable for mixing with hempcrete size 10 x 20 x 60 cm according to TIS 2601-2556, which has a compressive strength of 37.45 kg/cm2, water absorption was 22.45%, and density was 1,137.19 kg/m3. It was classified as lightweight concrete block type C12. The hempcrete products obtained from this research can be used as lightweight blocks for building walls and can be plastered with normal plaster.


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Khamput ป. . (2022). Hempcrete using Cement and Gypsum Plaster as a Binder. Journal of Engineering, RMUTT, 20(1), 117–125. Retrieved from https://ph01.tci-thaijo.org/index.php/jermutt/article/view/248572
Research Articles


William S, Sparrow A. The hempcrete book: designing and building with hemp-lime. Green Books. United Kingdom; 2014.

Sinsiri T, Thaiying K, Prastsoong P, Tangsathit S. Sustainability indicators review of hemp shiv as alternative materials for the construction industry in Thailand. The 25th National Convention on Civil Engineering; Chonburi, Thailand. 2020;MAT26-1-MAT26-8. (in Thai)

Khamput P. Interlocking block products from hemp core. 14th Annual Concrete Conference; Prachuap Khiri Khan, Thailand. 2019;ENV-008. (in Thai)

Khamput P. Hollow non-load-bearing concrete block products from hemp core. Thailand Research Expo: Symposium 2019 Proceedings; Bangkok, Thailand. 2019:434-45. (in Thai)

Pantawee S, Sinsiri T, Somna R, Akkakraisee S, Kuppatarat S. Basic properties of concrete containing hemp shives as coarse aggregate. 12th Annual Concrete Conference; Phetchaburi, Thailand. 2017;MAT95-MAT101. (in Thai)

Pantawee S. Development of hemp concrete using hemp shiv as coarse aggregate with aluminium sulfate and calcium hydroxide treatment and impact of fly ash on hemp concrete. Thesis. School of Civil Engineering Institute of Engineering Suranaree University of Technology. Nakhon Ratchasima. Thailand. 2017. (in Thai)

Khamput P. Hempcrete using gypsum plaster as a binder. 21st National Environment Conference (NEC21). Pathumwan Princess Hotel Bangkok, Thailand. 2022:273-8. (in Thai)

Thai Industrial Standards Institute. Standard or cellular lightweight concrete blocks using preformed foam (TIS.2601-2556). Ministry of industry; 2013. (in Thai)

Thai Industrial Standards Institute. Standard for hemp hurd (TIS.3185-2564). Ministry of industry; 2022. (in Thai)

Thai Industrial Standards Institute. Standard for Portland cement part 1 specification (TIS.15 part 1-2555). Ministry of industry; 2012. (in Thai)

Thai Industrial Standards Institute. Standard for gypsum molding plaster for ceramic industry (TIS.2488-2553). Ministry of industry; 2010. (in Thai)

British Standards. Method for making test cubes from fresh concrete. Testing concrete part 108. (BS 1881 : Part 108). British Standards Institution; 1983.

Kroehong W, Haruehansapong S. Mechanical Properties, Thermal Conductivity and Microstructure of Hemp Concretes. KMUTT Research & Development Journal. 2020;43(1) :91-102. (in Thai)

Setthabutr C. Concrete Technology, 5thedition. The Concrete Product and Aggregate co.,ltd. Bangkok. 2000:15-16. (in Thai)

Chindaprasirt P, Jaturapitakkul C. Cement Pozzolanic and concrete. 7thedition. Thailand Concrete Association, Bangkok; 2012. (in Thai)

Roberts T. Building with hempcrete; 2020 [sited 2022 May 27]. Available from: https://www.buildwithrise.com/stories/building-with-hempcrete.