In case of the English bond bricks were laid in alternate layers of headers and stretchers. while flemish bond has alternate headers and stretchers within a layer, giving good looks to the surface. English bond has high strength value while flemish bond has looks.
Flemish bond wall construction is not as strong as the English bond brick wall.In a Flemish Bond wall, alternate header and stretcher are laid in every course of the bricks, header bricks being centrally placed between the stretcher bricks in a course and between the stretchers of the top and bottom courses.See the pic in related link for the intersection in Flemish Bond wall construction.
Masonry bond refers to the pattern of the bricks within a wall. The most basic is running bond, where all brick within a wall are stretchers (laid with the long, narrow face outward). In English bond, a course of stretchers is followed by a course of header brick, which are laid with their longer edge going back into the wall. This gives the wall a horizontal striped pattern. In Flemish bond, adjacent bricks in each course alternate between stretcher and header, and the next course is reversed. This gives the wall a diagonally striped pattern. I'm less certain of this next (because these bond patterns are expensive and rarely used in brick veneer construction), but I believe single vs double Flemish bond refers to the thickness of the wall. Single is actually two wythes of brick (an inside and an outside wythe) where double is three or more wythes thick. This allows the pattern on the inside to be more independent of the outside pattern, and simplifies corners and masonry openings.
state construction of english bonds
the energy required to break covalent bond in si is 1.1ev and in ge is 0.7ev
pukimak
Single Flemish bond consists of alternating headers and stretchers in each course, creating a more varied texture. Double Flemish bond has two headers followed by one stretcher in each course, resulting in a smoother, more regular appearance.
Flemish garden wall bond is a bond pattern used for garden walls, consisting of alternating stretchers and headers in each course. Flemish bond is a more decorative bond, with alternating headers and stretchers in each course, creating a consistent pattern on both sides of the wall. Flemish bond is typically used for more formal or decorative brickwork.
Flemish bond wall construction is not as strong as the English bond brick wall.In a Flemish Bond wall, alternate header and stretcher are laid in every course of the bricks, header bricks being centrally placed between the stretcher bricks in a course and between the stretchers of the top and bottom courses.See the pic in related link for the intersection in Flemish Bond wall construction.
English bond is considered stronger than Flemish bond because of its alternating pattern of header and stretcher bricks. This arrangement provides more strength and stability to the structure compared to the repeating pattern of headers and stretchers in Flemish bond. English bond also distributes loads more effectively, resulting in a more robust construction.
Flemish bond is a type of brick bonding pattern that is often used for aesthetic purposes in masonry work. It is commonly employed in traditional or historic buildings to create a visually appealing facade. Flemish bond is also valued for its structural stability and durability in brickwork construction.
Ionic bond: the difference between electronegativities of the atoms is over 2.Covalent polar bond: the difference between electronegativities of the atoms is under 2.Covalent non-polar bond: the difference between electronegativities of the atoms is cca. zero
The type of bond that forms between atoms or compounds is determined by the electronegativity difference between the atoms involved in the bond. If the electronegativity difference is small, a covalent bond forms, where electrons are shared. If the electronegativity difference is large, an ionic bond forms, where electrons are transferred.
Some general rules are:- the difference between the electronegativities of two atoms is over 2: ionic bond- the difference between the electronegativities of two atoms is in the range 0 -2: covalent bond- the difference between the electronegativities of two atoms is approx. zero: polar covalent bond
When the difference in electronegativity between atoms is 0.9, a polar covalent bond exists.
The bond formed is nonpolar covalent if the difference in electronegativity between two atoms is between 0 and 0.5. This means that the electrons are shared equally between the atoms in the bond.
If there is a slight electronegativity difference, the bond is a nonpolar covalent bond. If there is a large electronegativity difference, it is an ionic bond. If the difference is somewhere between, it is a polar covalent bond.
Electronegativity is a measure of an atom's ability to attract shared electrons in a chemical bond. In general, the greater the electronegativity difference between two atoms in a bond, the more polar the bond. A higher electronegativity difference between two elements in a bond typically results in an ionic bond while a smaller difference leads to a covalent bond.