Cement and concrete, Science

Assignment Help:

Cement and concrete

Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it hardens. Study its appearance and its properties. Break a piece of cement and study it. Mix the dry cement with about twice as much sand or gravel. This will form concrete. After adding water and mixing thoroughly place it in moulds. Permit these to arden various days. Again study the appearance and the characteristics of these samples.

 


Related Discussions:- Cement and concrete

Explain colouration of faeces - functions of bile, Explain Colouration of f...

Explain Colouration of faeces - Functions of Bile The iron-free breakdown products of haemoglobin (i.e. bilirubin and biliverdin) oxidize to brown stereobilin. This stereobilin

Emergence of botany, Botany: In the Bronze and the Iron Ages, agricultu...

Botany: In the Bronze and the Iron Ages, agriculture became the principal mode of production of man in all lands. It is, thus, not surprising that in India, botany and elementa

Balanced diet, Balanced diet: We have dealt with quality and quantity o...

Balanced diet: We have dealt with quality and quantity of food. Both of  these should be balanced in a diet. A balanced diet is a combination of various foods which can fulfil

How to calculate the student t test, How to calculate the student t test st...

How to calculate the student t test step by step when the mean of heart rate at 1 minute is 5.0,17.2,22.9,8.3,10,76.5,70,19.7 and for breathing rate it is 22.2,28.5,20,12.5,20,92,

Describe the soil factors in fertilizer requirements, Describe the Soil  f...

Describe the Soil  factors in fertilizer requirements Physical condition of the soil, soil fertility  and soil reaction are three important soil factors.  A poor physical condi

Explain examination of urine, Explain Examination of Urine Examination ...

Explain Examination of Urine Examination of urine is done to detect the presence of any abnormal constituent(s) and hence can be used as an important screening test for identif

Lab coats in personal protective devices, Lab coats : The lab coat should ...

Lab coats : The lab coat should fit well and should be buttoned up correctly at all times. Cotton lab coats are more suitable than those made from nylon as the former could absorb

Nuclear fission, Nuclear Fission: Splitting the Atom  You know  that ...

Nuclear Fission: Splitting the Atom  You know  that atoms are made up of a nucleus and electrons moving around the nucleus, and the nucleus  is made up of protons and neutron

Cognitions - minnesota multiphasic personality inventory, Cognitions  Mr...

Cognitions  Mr. X sees himself as very capable to meet the demands of his environment (LSE=41) and has confidence in his abilities to deal with his problems (TRT=39). He sometim

Define the functions of the macrophages, Define the functions of the Macrop...

Define the functions of the Macrophages The macrophages: 1)  phagocytose microorganisms and inert particles 2)  secrete IL-1 (Interlukin I), TNF (tumor necrosis factor),

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd