- Universally used structural material.
- Complex material made out of cement, sand and pebbles etc mix with water.
- Strong against compression but weak against tension
- At construction site, any structures' facilities or architecture, need concrete essentially.
- Concrete is cheap, easy to get anywhere and form to any shape.
- Since, money needed in framed construction in modern structu
concrete refers to concrete tie that compression is strong but strengthen reinforcing rod to strengthen seal because is weak to seal.
(1) RC method of construction
Fig 7. RC structure.
If define RC method of construction breifly, because rubing cement and sand, gouge the interval and call method of construction to inlay reinforcing rod.
This method of construction that is called alias rein
axis and the line
which contacts uniaxial compressive circle and tensile circle
in Mohr's stress test.
2. METHOD OF CONCRETE
STRENGTH TEST
Testing for Compressive Strength
of Molded Concrete Cylinders
Testing for splitting tensile Strength
of Molded Concrete Cylinders
Test progress
2) Managing external debt using sustainability indicators
External debt management involves balancing resource mobilization and deployment as well as orderly repayment of future obligations. For sustainable debt management, policy makers need to project accurate debt dynamics that are sensitive to the way the current account deficits are being financed. If borrowed resources are not used produ
1.1 Company Background
The Hyundai Engineering and Construction Company was first founded by Chung Ju-Yung. And the establishment of Hyundai Motor Company took place a couple of decades later in 1964. In the early phase of the company’s development, it relied heavily on skilled labor forces and technologies in other advanced countries for automobile production. Hyundai Motor Company (hereina
Metal
Strength
Ductility
High melting points
Thermal and electrical conductivity
Toughness
free electrons
↓
Properties of metallic materials
Bonding
Nonferrous metal
중금속 copper tin nickel
경금속 Aluminum
귀금속 gold silver
희금속 radium
신금속 titan
합금
Copper
high electrical and thermal conductivity
high ductility
good corrosion r
I. Introduction
1. What is E-waste?
E-waste are the reusable or reparable electronics and secondary scraps (copper, steel, plastic etc.) which are dumped by consumers rather than recycled, including residue from reuse and recycling operations.
2. Social problem description
Nowadays, we can buy electronics with cheap prices because of the competition among the electronic companies and we
모든 물질은 순환한다는 점에 착안
Recycling을 함으로써 자연에서 생선된 물질을 다시 자연으로 돌려보내며 생태계의 평행을 유지하고 뿐만 아니라 더욱 비옥한 땅을 얻는 효과도 거둘 수 있다.
Selecting an Outdoor Compost Bin
Composting in a Small Outdoor Space
Rodent Proofing
Materials to Compost
Complete L