砾石
Also known as grit
thumb|upright=1.35|Gravel (largest fragment in this photo is about )
AI overview
Gravel is rock fragments that are larger than sand but smaller than cobbles, as shown in this sample where the largest piece is relatively modest in size. It's commonly used in construction, landscaping, and drainage applications where its durability and ability to allow water to pass through make it practical for various projects.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
- Image
- Gravel035 16K Color.png
Show 3 more facts
- Commons category
- Gravel
- OpenStreetMap tag
- resource=gravel
- exact match
- purl.obolibrary.org/obo/ENVO_01000018
via Wikidata · CC0
Article · 中文
砾石是指平均粒径大于2毫米，小于64毫米的岩石或矿物碎屑物，地质学中将粒径小于2毫米的定义为砂，大于64毫米至256毫米的为卵石。 砾石可以细分为细砾（粒径为2-10毫米），粗砾（10-100毫米）和巨砾（大于100毫米）;ISO 14688将砾石分为细砾（2~6.3毫米）、中砾（6.3~20毫米）、粗砾（20~63毫米）三个等级；伍登-温特沃斯量表则分成了5个等级。典型的砾石比重为1800千克/每立方米。 砾石由暴露在地表的岩石经过风化作用而成；常沉积在山麓和山前地带；或由于岩石被水侵蚀破碎后，经河流冲刷沉积后产生；砾石胶结后形成砾岩或角砾岩。 砾石可用来铺路，目前全球的砾石路总长甚至超过水泥路和沥青路总合。细砾还是制作混凝土的重要材料。
Abstract from DBpedia / Wikipedia · CC BY-SA