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Chapter 1

Masonry Materials

石積み
石積み
Masonry is an assembly of individual units like concrete blocks, stones, or bricks laid in rows and bonded with mortar to create walls, floors, arches, ...
モルタル
モルタル
Ingredients such as Portland cement, an essential binding agent; hydrated lime, which improves workability; sand, a carefully screened inert aggregate; ...
モルタルの特性
モルタルの特性
Good mortar in a plastic state possesses good workability and the ability to retain water. Good workability allows the mortar to spread smoothly, adhere ...
レンガ
レンガ
Bricks are masonry units made from fired clay in various shapes, sizes, and colors. Conventionally, bricks were made in a simple wooden mold, producing a ...
レンガのサイズ
レンガのサイズ
The dimensions of a brick are determined by three measurements: its width, height, and length. Typically, bricks are sized to build walls in modules of 4 ...
レンガの分類
レンガの分類
The bricks used in construction are generally classified as facing bricks, building bricks, and hollow bricks. Facing bricks, also known as face bricks, ...
レンガの耐久性、強度、外観
レンガの耐久性、強度、外観
Freeze-thaw is the process where water absorbed within a brick expands upon freezing and contracts when it thaws, leading to the degradation of the brick. ...
レンガ積み
レンガ積み
The simplest brick masonry wall has one single wythe with a stretcher course. In this arrangement, the brick's longer edge runs horizontally, with its ...
レンガの切断技術
レンガの切断技術
Consider building a brick wall where a full brick cannot fit into the remaining space. To fit a brick in this space, a mason's hammer with a ...
レンガ積みのモルタル目地
レンガ積みのモルタル目地
Mortar joints are the spaces between bricks filled with mortar. Joints bind the bricks together, ensuring structural integrity and strength. The thickness ...
レンガ壁の開口部の架け替え
レンガ壁の開口部の架け替え
When building brick walls, openings for windows and doors need to be supported with lintels, corbels, and arches to withstand the loads from the wall ...
補強レンガ積み
補強レンガ積み
Reinforced brick masonry incorporates steel reinforcements within the hollow cores of the bricks or sandwiched between two masonry wythes, then secured ...
建築石の種類
建築石の種類
Building stones are sourced by extracting rock from natural rock deposits and shaping it into the specific forms and dimensions needed for building ...
石の採石
石の採石
Quarrying involves the meticulous extraction of stone from a quarry by either using controlled explosions or precision cutting techniques to remove the ...
石積み
石積み
Stone masonry falls mainly into two categories: rubble and ashlar. Rubble masonry uses uneven, naturally shaped stones, often found as river rocks or ...
コンクリートブロックの製造
コンクリートブロックの製造
Manufacturing concrete masonry units involves pouring stiff concrete, comprising Portland cement, aggregates, and water, into metal molds. This is ...
コンクリート積みの敷設
コンクリート積みの敷設
Consider the construction of a concrete masonry wall; first, the base is cleaned, the mortar is spread, and then the initial row of blocks for a corner ...
鉄鋼製造
鉄鋼製造
Steel manufacturing begins with smelting iron ore into cast iron in the blast furnace. Smelting involves layering the iron ore with a fuel called coke and ...
構造用鋼製品
構造用鋼製品
Structural steel products are manufactured in a structural mill, where the beam blank is reheated and refined through rollers into the required shape and ...
鋼材の締結技術
鋼材の締結技術
Steel sections can be fastened using rivets, bolts, or welding. A rivet is a steel fastener with a cylindrical shaft and a specially shaped head. The ...
鋼の機械的特性
鋼の機械的特性
Mechanical characteristics of steel such as tensile strength are determined by a tension test where a specimen is pulled in a gripping device. The tension ...
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