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Effects of Using Compost as a Preventive Measure to Mitigate Shoulder Cracking: Laboratory and Field Studies.
| 题名： | Effects of Using Compost as a Preventive Measure to Mitigate Shoulder Cracking: Laboratory and Field Studies. |
| 作者： | INTHARASOMBAT, N.; PUPPALA, A. J.; QASIM, S. |
| 关键词： | *Compost-; *Cracking-Fracturing; *Manure-; *Shrinkage-.;Composted-biosolids; Moisture-; Texas-; Compost-manufactured-topsoil. |
| 摘要： | Compost materials, given their moisture affinity, fibrous and low permeability characteristics, could provide stabilization of natural expansive subgrades by mitigating shrinkage cracking. In order to understand possible mechanisms of this stabilization, a research study was conducted in both laboratory and field phases to evaluate the effectiveness of compost material treatments to soils. This research report summarizes both phases results, which include laboratory and field studies to evaluate Dairy Manure Compost (DMC) and Biosolids Compost (BSC) manufactured topsoils (CMT) to lessen shoulder subgrade cracking. During the field phase, data was collected from embedded moisture and temperature sensors, digital image surface cracking studies, visual observations of paved shoulder cracking, runoff quality, and surficial erosion surveys of all sixteen CMT test plots and one control test plot. Both composts were mixed with the subsoils at different proportions and dimensions in these plots. The field data was collected for eighteen months and then analyzed with statistical comparison tests, which indicated that the BSC amendments provided the best subsoil enhancements by controlling moisture and temperature fluctuations from surrounding environments and thereby reducing shrinkage cracking in subsoils and in adjacent paved shoulders. The DMCs were less effective in mitigating shrinkage cracking, due to low amounts of organic contents, also resulting in erosion problems. The final outcome of this research is the recommendation of BSC material to treat 4 in. of top subgrade shoulders for a width of 10 ft in order to control or mitigate soil shrinkage cracking. |
| 报告类型： | 科技报告 |
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