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| Rock strength variation by microclimate: Schmidt Hammer data of sandstone outcrops from Tuscany (Central Italy) | |
| Magaldi, Donatello | |
| 来源期刊 | GEAM-GEOINGEGNERIA AMBIENTALE E MINERARIA-GEAM-GEOENGINEERING ENVIRONMENT AND MINING
 |
| ISSN | 1121-9041 |
| 出版年 | 2019 |
| 期号 | 157页码:15-21 |
| 英文摘要 | It is well known that climatic factors can influence the degradation of rocks in different geographic environments, thus affecting the durability of natural construction materials. Research has been carried out to assess the current state of natural degradation of an Oligocene-Miocene lithic greywacke occurring without appreciable lithological and mineralogical variations from, NW to SE in Tuscany (northern Italy), considering 52 rocky outcrops distributed from approximately N 44 degrees to N 43 degrees. For each outcrop, the Schmidt Hammer "rebound" values (SH), which are directly proportional to the rock compressive strength, and the natural logarithm of the average annual solar radiation by geographic coordinates according to the Italian National Board for New Technology Energy and the Environment Atlas (ENEA) in MJ/m(2)/y (LN values), were evaluated. The results showed a significant relationship between the SH and LN: the SH values decrease significantly when passing from the cold and humid areas to the hottest and dry ones. Moreover, considering the values of the average air thermal excursion of each year in degrees centigrade, it is noteworthy that these can be divided into two groups (excursion >=7.8 and excursion >= 7.8 degrees C) which in relation to the SH give rise to more significant distributions similar to the relation between the SH and LN. We, therefore conclude that solar radiation, and thermal excursion, in particular, are responsible for the lower mechanical strength that occurs in the warmer and drier areas, as opposed to that in the colder and moister northern zones. The research also demonstrates that sandstone degradation processes due to thermal stress are not exclusive to arid and semi-arid areas, but they also occur in a reduced form, in temperate areas. |
| 英文关键词 | Schmidt Hammer Lithic Greywackes Insolation weathering Compressive strength Geoindicators |
| 类型 | Article |
| 语种 | 英语 |
| 收录类别 | ESCI |
| WOS记录号 | WOS:000500195800003 |
| WOS关键词 | BREAKDOWN |
| WOS类目 | Engineering, Geological |
| WOS研究方向 | Engineering |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/333954 |
| 作者单位 | [Magaldi, Donatello] Univ Laquila, Engn Geol, Laquila, Italy; [Magaldi, Donatello] Univ Firenze, Engn Geol, Florence, Italy |
| 推荐引用方式 GB/T 7714 | Magaldi, Donatello. Rock strength variation by microclimate: Schmidt Hammer data of sandstone outcrops from Tuscany (Central Italy)[J],2019(157):15-21. |
| APA | Magaldi, Donatello.(2019).Rock strength variation by microclimate: Schmidt Hammer data of sandstone outcrops from Tuscany (Central Italy).GEAM-GEOINGEGNERIA AMBIENTALE E MINERARIA-GEAM-GEOENGINEERING ENVIRONMENT AND MINING(157),15-21. |
| MLA | Magaldi, Donatello."Rock strength variation by microclimate: Schmidt Hammer data of sandstone outcrops from Tuscany (Central Italy)".GEAM-GEOINGEGNERIA AMBIENTALE E MINERARIA-GEAM-GEOENGINEERING ENVIRONMENT AND MINING .157(2019):15-21. |
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