Innovation Series: Advanced Science (ISSN 2938-9933, CNKI Indexed)

Design of the Mix Ratio for TRD Construction Waste as a Growing Medium

Shuai Lv*, Xinyang Liao

College of Water Resources and Civil Engineering, Hunan Agricultural University, Changsha 410128, China

Corresponding Author: Shuai Lv

Abstract: To investigate the feasibility of using TRD construction waste as a planting substrate for ecological restoration, this study conducted indoor pot experiments to compare the effects of mixed substrates comprising TRD construction waste and ordinary soil in varying proportions on the growth characteristics of tall fescue. The study measured and analysed the growth dynamics of plant height and changes in growth density over different cultivation periods, thereby identifying the suitability of TRD construction waste for use as a planting substrate and determining the optimal blending ratios. The results indicate that when the proportion of TRD spoil does not exceed 25%, the growth rate and density of tall fescue reach levels comparable to those achieved when grown in pure ordinary soil. However, when the proportion exceeds this threshold, the growth of tall fescue is significantly inhibited, with plant height growth slowing and growth density decreasing. This indicates that, following appropriate blending, TRD spoil can be utilised as a raw material for planting substrates in ecological restoration, thereby enabling the on-site ecological utilisation of construction waste soil.

Keywords: Construction waste; Red soil; Vegetation trials; Resource recovery

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