Dong Shaoce, Li Chenggao, Xian Guijun
Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China.
Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China.
Polymers (Basel). 2021 Jan 2;13(1):154. doi: 10.3390/polym13010154.
Application of glass- or carbon-fiber-reinforced polymer (GFRP/CFRP) bars makes the direct use of seawater and sea sand concrete (SWSSC) in construction feasible, which is of high interest in order to conserve the limited resources of fresh water and river sand. The present paper performed the life cycle assessment (LCA) of constructing three kinds of beams (GFRP/CFRP bar-reinforced SWSSC beams, and steel bar-reinforced common concrete (SRC) beam) in marine environments to show the environmental benefits of using FRP bar-reinforced SWSSC beams in marine environments. According to ISO 14040 and ISO 14044, stages including production, transportation, construction, use and end-of-life are within the LCA's boundary. The ReCiPe method and eight main environmental impact categories were used to characterize the environmental impacts of those beams. LCA results indicate that one cubic meter SWSSC possesses much lower environmental impacts in terms of all eight categories compared with common concrete with the same volume when used in marine environments, with reduction rates from 26.3% to 48.6%. When the two transportation distances were set as 50 and 20 km and without considering the difference in service life, compared to SRC beam, GFRP-SWSSC beam performs better in six categories and CFRP-SWSSC beam performs better in four categories. When considering increased transportation distance and the higher durability performance, the advantageous categories for GFRP-SWSSC and CFRP-SWSSC beams increase to seven and six, respectively. The environmental impacts of all the three beams are mainly affected by the production stages.
玻璃纤维或碳纤维增强聚合物（GFRP/CFRP）筋的应用使得在建筑中直接使用海水海砂混凝土（SWSSC）成为可能，这对于节约有限的淡水和河砂资源具有重要意义。本文对在海洋环境中建造三种梁（GFRP/CFRP筋增强SWSSC梁和钢筋增强普通混凝土（SRC）梁）进行了生命周期评估（LCA），以展示在海洋环境中使用FRP筋增强SWSSC梁的环境效益。根据ISO 14040和ISO 14044，生产、运输、施工、使用和寿命结束等阶段均在LCA的边界范围内。采用ReCiPe方法和八个主要环境影响类别来表征这些梁的环境影响。LCA结果表明，在海洋环境中使用时，一立方米SWSSC在所有八个类别方面的环境影响均远低于相同体积的普通混凝土，降低率在26.3%至48.6%之间。当将两种运输距离设定为50公里和20公里且不考虑使用寿命差异时，与SRC梁相比，GFRP-SWSSC梁在六个类别中表现更好，CFRP-SWSSC梁在四个类别中表现更好。当考虑运输距离增加和更高的耐久性时，GFRP-SWSSC梁和CFRP-SWSSC梁的优势类别分别增加到七个和六个。所有三种梁的环境影响主要受生产阶段的影响。
