In an era where sustainability is becoming increasingly critical, a recent study led by Vanderschelden Bruno from Ghent University sheds light on the significant advantages of lime mortar over traditional cement-based alternatives. Published in the MATEC Web of Conferences, this research not only highlights the environmental benefits of lime mortar but also its potential to reshape practices within the construction industry.
Since the 1970s, the construction sector has heavily favored cement-based mortars, marking a shift away from the circular economy principles of reusing materials. This change has complicated the recovery of bricks from dismantled structures, as cement mortar tends to create cracks that render bricks unusable. In contrast, lime mortar facilitates easier recovery, making it a more appealing option for historical restoration and renovation projects. “Lime mortar joints make the recovery of bricks manageable,” Bruno notes, emphasizing the practical implications of this material choice.
The study delves into the hygrothermal behavior of a hybrid construction model that combines load-bearing masonry with lime-hemp insulation. One of the standout findings is that lime mortar demonstrates superior moisture transport and storage capabilities, enhancing the waterproofing characteristics of masonry. This is particularly relevant as the construction industry grapples with climate-related challenges, where water infiltration can lead to significant structural issues.
To assess the performance of lime mortar versus cement mortar, the researchers conducted rain-tightness tests on eighteen different setups. These tests involved meticulous visual evaluations, weight measurements, and moisture assessments to monitor water absorption and rain penetration. The results are promising, suggesting that lime mortar not only performs better in terms of moisture management but also contributes to a reduction in CO2 emissions. Lime has the remarkable ability to capture up to 90% of the CO2 produced during its manufacture, a crucial factor given that the construction industry is responsible for 37% of global CO2 emissions.
Bruno’s research represents a pivotal moment for the construction sector, where the push for sustainable building practices is gaining momentum. By promoting the use of lime mortar, this study encourages a shift towards materials that not only improve structural integrity but also align with global sustainability goals. The commercial implications are significant; as more builders and developers embrace eco-friendly practices, the demand for lime-based products could rise, leading to a transformation in material sourcing and construction methodologies.
In summary, the findings presented by Vanderschelden Bruno and his team offer a compelling case for the adoption of lime mortar in modern construction. This research, published in the MATEC Web of Conferences, serves as a reminder that the path to sustainability may lie in re-embracing traditional materials and practices that prioritize both environmental responsibility and structural performance. As the construction industry continues to evolve, the insights from this study could play a vital role in shaping future developments, steering the sector towards a more sustainable and resilient future.
