Which stones are used in garden projects?

　　Garden engineeringPublished by the China Construction Industry Publishing House, it is suitable for secondary vocational education. The book introduces other major garden engineering design and construction technical knowledge and methods other than garden construction engineering. So which stones are used in garden engineering?

1, natural marble

Marble originally refers to the white limestone with black stripes produced in Dali, Yunnan Province. The section can constitute a natural ink landscape painting. In ancient times, marble with formed stripes was often used to make painting screens or mosaics. Later, the title of marble was gradually developed. All kinds of limestone with various color patterns are used to make building decoration materials. White marble is generally called white marble. Natural marble is arranged in fine, solid, polished, and various colors. Small, but because it is not resistant to weathering, it is less used outdoors.

2, sandstone

Sandstone is a kind of sedimentary rock, which is mainly composed of sand particles and glue. Most of the sandstones are composed of quartz or feldspar. Sandstone has strong granularity, wavy texture on the surface, soft and delicate texture, and the same color as sand. It is any color, the most common ones are brown, yellow, red, gray and white. Sandstone has large pores and high water absorption, easy to absorb dirt, easy to breed microorganisms, and the material hardness is low and brittle. Patchwork.

3, Slate

Slate is a rock with a plate-like structure and basically no recrystallization. It is a metamorphic rock. The original rock is argillaceous, silty or neutral tuff. It can be peeled into thin slices along the direction of the plate. The color of slate varies with it. The impurities contained vary, iron-containing ones are red or yellow; carbon-containing ones are black or gray; calcium-containing ones will foam when exposed to hydrochloric acid, so they are generally named after their colors, such as green slate, black slate, calcium Quality slate. The hardness of slate is better than that of sandstone but lower than that of granite. Generally, it is suitable for façade decoration and pavement of small area.