E3S Web Conf.
Volume 353, 20228th International Conference on Energy and City of the Future (EVF’2021)
|Number of page(s)||4|
|Section||City, Environment & Buildings of the Future|
|Published online||29 June 2022|
Characterization of tunnel excavated earth-based mortars for rammed earth repair
Laboratoire de mécanique et matériaux du génie civil (L2MGC), CY Cergy Paris Université (EA4114), France
* Corresponding author: firstname.lastname@example.org
The aim of this work is to study the possibility to reuse the tunnel excavated earth in order to elaborate earth-based mortar for rammed earth reparation. The tunnel excavated earth-based mortars were compared with raw earth based-mortars, largely used in practice. The cement was used as stabilizer and the hemp fibers were used to diminish the cracking due to shrinkage. The mechanical, thermal and hydric properties of mortars were characterized after 28 days. The mortars were maintained in hydrothermal chamber at controlled conditions, 20 ± 2 °C and 50 ± 5 HR. The obtained results show that the mechanical performances increase with the increase of cement by earth ratio. While, the increase of cement content affects negatively the thermal conductivity of earth-based mortars. Whereas, the thermal properties were improved with the addition of natural fiber. The excavated earth-based mortars show higher mechanical performances and good thermal properties compared to raw earth-based mortars.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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