KODI MIyala WOYERA WACHILENGEDWE NDI CHIYANI NDIKUTI INGAGWIRITSE NTCHITO KUTI? malo mwala

Chifukwa chiyani ena miyala yachilengedwe considered to be soft when they all appear to be hard? The answer lies within ‘relative’ hardness. Mohs scale of hardness was invented in 1812 and compares the relative hardness of ten minerals. Diamond is the hardest and rates a 10, while granite is the toughest natural stone at 6. Limestone comes in at 3 as does its metamorphic counterpart, marble. Softer stone is easier to dress or carve but does not wear or weather quite as well as harder stone. Here we discuss some of the more popular soft stones along with suitable applications.

Miyala yosakhazikika

Mwala wa Sedimentary

Miyala, mchenga ndi shale ndi mitundu yambiri ya miyala ya sedimentary. Izi zinapangidwa kupyolera mu kupsyinjika kwakukulu, kwa zaka mamiliyoni ambiri, kugwera pansi pa matope omwe adagwera pansi pa nyanja.

Slate

The layers in slate are described as being “foliated” and they are easily split apart to create whatever thickness is required. UK slate is considered to be hard and was traditionally used as roofing, while soft slate is found in China, Spain, Italy and the USA. With a broad range of natural slate colours, a multiple array of designs can be achieved, from contemporary to classic, rustic to refined. Slate is often recommended for high traffic areas, thanks to its remarkably durable composition. It is also non-porous and does not easily react with acid liquids. It is fire proof, weather resistant and achieves good slip resistance dues to its riven finish.

Mwala wamiyala

Limestone is a very common building material and is formed mainly from the mineral calcite, derived from the calcium in bones and seashells deposited over the millennia and forced together through pressure. While it also contains magnesium, it is harder and more weather resistant, and can also be polished. Portland stone from the eponymous island in Dorset is probably the single most famous type of limestone and was used to build many of London’s great buildings. It is used for external cladding as well as paving, fireplaces and other internal and external decorative features. Its soft colours are its trademark visual attributes.

Mwala wa mchenga

Mwala wamchenga mwina unali mwala womangira womwe umagwiritsidwa ntchito kwambiri chisanafike 1800, pachilichonse kuyambira milatho kupita ku nyumba zapamwamba. Monga momwe angatchulidwe kuchokera ku dzina lake, amapangidwa pamene mchenga, zinthu zamoyo, calcite ndi mchere wina zinasakanikirana pamodzi pansi pa kupanikizika kwakukulu kwa zaka zikwizikwi. Amapezeka ndi mawonekedwe owoneka bwino kapena owoneka bwino ndipo mwachikhalidwe amaperekedwa kumapeto kwa matt. Makamaka kirimu, wofiira kapena imvi ku UK, mtundu wake umadalira mchere wowonjezera womwe uli mkati mwake. Silika imapereka kuyera, pomwe chitsulo chimapereka utoto wofiirira. Malo ake akuluakulu ogwiritsira ntchito ndi makoma ndi pansi, kapena kupaka kunja.

Marble

Marble amachokera ku miyala yamchere, yomwe imapangidwa kudzera mu kusintha kwa kutentha kwakukulu ndi kupanikizika kwa zaka mamiliyoni ambiri. Ngakhale kuti ndi yofewa poyerekeza ndi miyala ina, marble amakonda kupukuta bwino kwambiri. Mwachikhalidwe marble amagwiritsidwa ntchito pazitseko ndipo amathandiza kupanga mapeto apamwamba.