生物质燃烧灰和木质素对水泥砂浆性能及其环境影响

The Effects of Biomass Combustion Ash and Lignin on the Properties of Cement Mortars and Their Environmental Impact.

作者信息

Ryłko Iwona, Bobak Łukasz, Telega Paweł, Białowiec Andrzej

机构信息

Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, 37a Chełmońskiego Str., 51-630 Wrocław, Poland.

出版信息

Materials (Basel). 2025 May 2;18(9):2086. doi: 10.3390/ma18092086.

DOI:10.3390/ma18092086

PMID:40363589

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12072960/

Abstract

Combustion and hydrolysis of lignocellulosic biomass generate renewable energy and biofuels, but also yield by-products, such as biomass combustion ash (BCA) and waste lignin (WL). This study investigates the reuse of these by-products in cement mortars, promoting circular economy principles and sustainable construction practices. The addition of BCA at 1-10% improved mortar consistency, homogeneity, and adhesion-most notably, formulations with 5-10% BCA increased adhesion to EPS by up to 4.3%, and compressive strength remained above the 20 MPa threshold. WL additions of 0.5-1% enhanced viscosity and adhesion to both mineral and EPS substrates, with a 0.2% WL dosage improving adhesion to EPS by 9.4% compared to the control sample. Life Cycle Assessment (LCA) confirmed a reduction in the carbon footprint by up to 14% (from 1509.5 to 1297.5 Mg CO/year), while VOC emissions remained within acceptable limits. Leachability tests confirmed safe environmental performance. The results validate BCA and WL as functional and eco-efficient additives in cementitious composites suitable for thermal retrofitting.

摘要

木质纤维素生物质的燃烧和水解可产生可再生能源和生物燃料，但也会产生副产品，如生物质燃烧灰（BCA）和废弃木质素（WL）。本研究探讨了这些副产品在水泥砂浆中的再利用，以促进循环经济原则和可持续建筑实践。添加1%-10%的BCA可改善砂浆的稠度、均匀性和附着力——最显著的是，添加5%-10%BCA的配方使与EPS的附着力提高了4.3%，抗压强度仍高于20MPa的阈值。添加0.5%-1%的WL可提高粘度以及与矿物和EPS基材的附着力，与对照样品相比，添加0.2%的WL可使与EPS的附着力提高9.4%。生命周期评估（LCA）证实碳足迹减少了14%（从每年1509.5 Mg CO降至1297.5 Mg CO），而挥发性有机化合物（VOC）排放仍在可接受范围内。浸出性测试证实了其安全的环境性能。结果验证了BCA和WL作为功能性和生态高效添加剂在适用于热改造的水泥基复合材料中的作用。