ที่บ้านคุณฝนตกไหม

ที่บ้านคุณฝนตกไหม

ผลลัพธ์ (อังกฤษ) 1:

Rain at home?

ผลลัพธ์ (อังกฤษ) 2:

At home, you know rain

ผลลัพธ์ (อังกฤษ) 3:

Cement is a key material in construction. It consists of a very powder. When water is added, to cement a chemical reaction. Occurs and the, cement begins to set - it starts to become solid. The most widely used cement-based material, in concrete. Which is made, from cement fine aggregate (sand), coarse aggregate (gravel) and water. After concrete, has set it needs time. To reach its structual strength - the strength need to perform effectively. Generally engineers consider, that this strength. Is reached after 28 days - a point called 28-day strength.