3. Masonry
45 Questions
20 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which type of mortar is typically used for reinforced masonry applications like foundations?

  • Type O Mortar
  • Type N Mortar
  • Type K Mortar
  • Type M Mortar (correct)
  • What is the primary benefit of adding lime to cement mortar?

  • Reduces setting time
  • Increases compressive strength
  • Enhances plasticity and water retention (correct)
  • Eliminates the need for sand
  • Which type of mortar is characterized by a compressive strength of 750 psi?

  • Type N Mortar (correct)
  • Type S Mortar
  • Type M Mortar
  • Type D Mortar
  • What is the main component of masonry cement that distinguishes it from other mortar types?

    <p>Contains hydrated lime and plasticizers</p> Signup and view all the answers

    Which type of plaster is known for its good finish on the interior surfaces?

    <p>Gypsum Plaster</p> Signup and view all the answers

    What is a defining feature of Type O Mortar?

    <p>It is suitable for interior non-load-bearing walls.</p> Signup and view all the answers

    In the mortar mix proportions table, what ratio represents Class B mortar?

    <p>1:3</p> Signup and view all the answers

    What is the typical setting characteristic of lime mortar compared to cement mortar?

    <p>It has a lower rate of hardening and setting.</p> Signup and view all the answers

    What is one characteristic of rubble stone?

    <p>It is delivered in rough and irregular shapes.</p> Signup and view all the answers

    Which type of stonework is characterized by fitting stones of different shapes together randomly?

    <p>Random Work</p> Signup and view all the answers

    What differentiates dimension stone from rubble stone?

    <p>Dimension stone is cut to specific sizes and shapes.</p> Signup and view all the answers

    Which of the following is a feature of Ashlar masonry?

    <p>Stones are squared and laid in regular courses.</p> Signup and view all the answers

    What is the primary purpose of the rustic or rock work stone face?

    <p>To give a jagged or rough surface effect.</p> Signup and view all the answers

    Which of these types of stonework involves laying stones in courses that are not uninterrupted?

    <p>Broken Range Ashlar</p> Signup and view all the answers

    What is a common feature of Coursed Ashlar stonework?

    <p>It is characterized by uniform courses of uniform sizes.</p> Signup and view all the answers

    Which type of rubble stone treatment only removes the most obvious irregularities?

    <p>Scrabbled Rubble</p> Signup and view all the answers

    What key characteristic distinguishes sandstone from other types of building stones?

    <p>It is composed primarily of quartz sand.</p> Signup and view all the answers

    Which type of stonework involves a combination of stones laid in regular courses but varying their size and placement?

    <p>Random Coursed Ashlar</p> Signup and view all the answers

    What is a primary characteristic of masonry walls?

    <p>They are bonded with mortar.</p> Signup and view all the answers

    Which type of masonry wall consists of two layers with an air space in between?

    <p>Cavity Walls</p> Signup and view all the answers

    What is the purpose of bond stones in masonry walls?

    <p>To bind the wall together.</p> Signup and view all the answers

    Which of the following materials is primarily used to make Concrete Hollow Blocks (CHB)?

    <p>Concrete, portland cement, and aggregates</p> Signup and view all the answers

    Which statement accurately describes reinforced masonry walls?

    <p>They use steel reinforcing bars embedded in the masonry.</p> Signup and view all the answers

    What unique feature do weep holes provide in masonry walls?

    <p>They allow for water drainage.</p> Signup and view all the answers

    What is the primary function of flashing membranes in masonry walls?

    <p>To protect against moisture damage.</p> Signup and view all the answers

    What distinguishes a veneered wall from other masonry wall types?

    <p>It has facing material applied over a core wall.</p> Signup and view all the answers

    What is typically the preferred size of hollow blocks in the Philippines market?

    <p>4&quot;, 5&quot;, and 6&quot; with 3 holes</p> Signup and view all the answers

    What characteristic do unreinforced masonry walls lack that reinforced walls possess?

    <p>Embedded steel reinforcing bars</p> Signup and view all the answers

    What is the primary characteristic of Lightweight Gypsum Plaster?

    <p>It is mixed with perlite or vermiculite for fire resistance.</p> Signup and view all the answers

    Which type of plaster is primarily used for ornamental work and castings?

    <p>Plaster of Paris</p> Signup and view all the answers

    What is the minimum thickness of the finish coat in a three-coat plaster job?

    <p>1/8&quot;</p> Signup and view all the answers

    Which plaster type is known for its increased adhesive strength?

    <p>Bonding Plaster</p> Signup and view all the answers

    What is the role of the 'course' in masonry terms?

    <p>A continuous layer of bricks, stones, or masonry units.</p> Signup and view all the answers

    Which term refers to a brick or block laid lengthwise in a wall?

    <p>Stretcher</p> Signup and view all the answers

    Which type of plaster is mixed with fine white sand for a smooth finish?

    <p>Prepared Gypsum Plaster</p> Signup and view all the answers

    In sgraffito, how are the different colored layers of plaster manipulated?

    <p>By cutting away certain areas after application.</p> Signup and view all the answers

    What distinguishes High-Strength Gypsum Plaster from standard Gypsum plaster?

    <p>It meets established standards for strength.</p> Signup and view all the answers

    What is a 'wythe' in masonry construction?

    <p>A continuous vertical section one unit thick.</p> Signup and view all the answers

    Which type of brick is specifically designed for exposed masonry applications?

    <p>Facing Brick</p> Signup and view all the answers

    What is the primary feature of Flemish Bond in brickwork?

    <p>Alternating headers and stretchers in each course</p> Signup and view all the answers

    What is the typical size of a standard brick?

    <p>3-3/4'' x 2-1/4'' x 8''</p> Signup and view all the answers

    Which type of brick is known for being fire-resistant and load-bearing?

    <p>Fire Brick</p> Signup and view all the answers

    Which bond method features headers centered over stretchers?

    <p>English Bond</p> Signup and view all the answers

    What is a key characteristic of Glazed Bricks?

    <p>Smooth outer surface with a variety of finishes</p> Signup and view all the answers

    What distinguishes English Cross Bond from standard English Bond?

    <p>It offsets head joints in stretching courses</p> Signup and view all the answers

    Study Notes

    Mortar

    • Mortar is a mixture of siliceous materials (sand, crushed stone) and cement (lime, Portland) that hardens into a stone-like mass when mixed with water
    • Mortar is used to bond masonry units together or to apply surfaces like tiles, bricks, and stones
    • Cement Mortar: made with fine sand, requires more cement for strength, mixed by hand or mechanically
    • Lime Mortar: mixture of lime, sand, and water, low setting and hardening rate, low compressive strength, rarely used
    • Cement-Lime Mortar: Cement mortar with added lime for plasticity and water retention
    • Masonry Cement: proprietary mixture of Portland Cement with hydrated lime, plasticizers, air-entraining agents, and gypsum, only needs sand and water

    Mortar Strengths

    • Type M Mortar: High strength for reinforced masonry used for foundations and retaining walls below ground
    • Type S Mortar: Medium-high strength for applications where good bond and lateral strength are important
    • Type N Mortar: Medium-strength for general use above grade, where high compression and lateral strength are not required
    • Type O Mortar: Low-strength mortar, suitable for interior non-load-bearing walls
    • Type K Mortar: Very low-strength mortar, suitable for interior non-load-bearing walls

    Mortar Proportions

    • Class AA: 1:1 Cement to Sand Ratio
    • Class A: 1:2 Cement to Sand Ratio
    • Class B: 1:3 Cement to Sand Ratio
    • Class C: 1:4 Cement to Sand Ratio
    • Class D: 1:5 Cement to Sand Ratio

    Plaster

    • Plaster is a mortar of cementitious materials (lime, gypsum, or cement), sand, and water applied in coats (layers) to provide a hard finish to interior or exterior walls and ceilings
    • Lime Plaster: a mixture of lime putty (hydrated lime and water) mixed with sand and gypsum plaster for interior and exterior walls and ceilings
    • Gypsum Plaster: Plaster of Paris with clay, lime, and other materials, covered by trademarks or patents

    Plaster Types

    • Exterior and Interior Walls/Ceilings: Mixed on the job with water, sand, and lime putty, sometimes including hair or fiber
    • High-Strength Gypsum Plaster: Same as Gypsum plaster but mixed to meet established standards
    • Fibered Gypsum Plaster: Gypsum plaster premixed with fibers
    • Prepared Gypsum Plaster: Gypsum plaster mixed with fine white sand
    • Bonding Plaster: Gypsum plaster mixed with more adhesive strength
    • Lightweight Gypsum Plaster: Fire-resistant Gypsum plaster with perlite, vermiculite, or other mineral aggregate
    • Keene's Cement: Plaster of Paris mixed with alum or borax, burned at 932°F
    • Portland Cement Plaster: Mixed on the job with water, sand, and lime putty
    • Plaster of Paris: Used for ornamental plaster work and castings

    Plaster Thickness

    • Metal lath: 5/8"
    • Lathing board/gypsum block: ½"
    • Three-coat plastering: scratch and brown coats are ¼" thick, finish coat is 1/8" with a minimum of 1/16" thickness

    Sgraffito

    • Highly decorative plaster technique developed in Italy during the Renaissance
    • Two or three thin coats of plaster in different colors are applied and then cut away to create a 3D design

    Unit Masonry

    • Unit masonry is built up of building materials (clay, concrete, or stone) set in mortar or plain concrete
    • Bed: Horizontal surfaces on which bricks or stones rest
    • Course: A continuous layer of bricks, stones, or masonry units
    • Wythe/Tier: A continuous vertical section of a wall, one masonry unit thick
    • Bond: Connection between masonry units, preventing vertical joints from falling over each other (also called a breaking joint)
    • Stretcher: A brick or block laid lengthwise of a wall
    • Header: A brick or block extending over the thickness of the wall
    • Heading course: All bricks/masonry units are headers
    • Soldier: A unit laid on its end, with its face perpendicular to the wall
    • Quoins: Corner stones at the angles of buildings, often rusticated

    Masonry Walls

    • Walls are made from modular building blocks or units bonded with mortar
    • Solid Walls: Simple construction
    • Cavity Walls: Two layers of masonry with an air space in between
    • Veneered Walls: A wall structure with a thin layer of facing material over a core wall

    Bonding Masonry Walls

    • Bond Stones: Stones running through the wall thickness at right angles to bind it together
    • Blocking Courses: A course of stones on top of the cornice or top to crown the wall

    Concrete Hollow Block (CHB) Walls

    • CHBs are made of concrete, portland cement, and aggregates (usually sand and fine gravel)
    • Lower density blocks can use industrial wastes as an aggregate
    • Lightweight blocks can use aerated concrete
    • Dimension of CHB: 8" (200mm) high, 16" (400mm) width and depths vary from 4" to 8" with 2 or 3 holes

    Concrete Block or Cement Block (CMU)

    • A hollow or solid concrete masonry unit (CMU) made of Portland cement and suitable aggregates

    Masonry Stress Types

    • Unreinforced masonry walls: Plain masonry walls with horizontal joint reinforcement and metal wall ties
    • Reinforced masonry walls: Walls utilize steel reinforcing bars embedded in grout-filled joints and cavities

    Other Components

    • WEEP HOLE: A hole at the bottom of the wall to allow water to drain
    • GRADE: A level where the top of the wall is
    • FLASHING MEMBRANES: Waterproof material used for protection from moisture

    Stone Building Materials

    • Stone is a fundamental building material commonly used for exterior and interior surfaces
    • Granite
    • Marble
    • Travertine
    • Limestone
    • Sandstone
    • Slate

    Rubble Stone

    • Rough and irregular shapes delivered from quarries
    • Scrabbled Rubble: Only the most obvious irregularities are knocked off
    • Range Rubble: Rough stones dressed and laid to a nearly uniform height.

    Dimension Stone

    • Cut into specific sizes, squared to dimensions and a specific thickness

    Stonework Types

    • Ashlar stones are squared and laid in regular courses
    • Random Work uses stones of different shapes fitted together randomly
    • Range Work or Coursed Ashlar:
    • Coursed Ashlar: stones laid in uniform courses of uniform sizes
    • Broken Range Ashlar: uniform size within courses, but course width and length of the stones is varied
    • Random Coursed Ashlar: stones laid in courses but their horizontal beds are not uniform, varying size and placement between stones

    Rustic or Rock Work

    • The stone face is jagged or rough, achieved by leaving protruding or projecting stone or stone around the joint areas

    Types of Bricks

    • Common/Building Brick: Used for all purposes
    • Facing Brick: Specially processed for a specific surface appearance, used for exposed masonry
    • Glazed Brick: Smooth outer surface, with a dull or high-gloss finish
    • Fire (Refractory) Brick: Used for furnace linings, fireplaces, and chimneys

    Brickwork

    • Common Bond: A course of headers is placed between every five or six courses of stretchers
    • English Bond: Alternate courses of headers and stretchers
    • English Cross Bond: A modified English bond, where the head joints in the stretching courses are offset
    • Flemish Bond: Alternative headers and stretchers in each course

    Standard Brick Size

    • 3-3/4" x 2-1/4" x 8"

    ATLAS-CDC Architecture Review

    Brick Bonds

    • Flemish Cross Bond: A modified Flemish bond where courses of alternate headers and stretchers alternate with stretching courses
    • Flemish Diagonal Bond: A form of Flemish cross bond where courses are offset to create a diamond pattern
    • Garden-Wall Bond: A brickwork bond suited for lightly loaded boundary walls
    • Herring-bone: Bricks are laid diagonally to form a herringbone pattern

    Brick Joints

    • Joints between brick courses range from 4.5mm (3/16") to 12mm (1/2")
    • Flush, keyed, strong, recessed, weathered, and raked out

    Other Masonry Units

    • "DURISOL" Block: Lightweight blocks made from fiber and cement
    • Plaster Block: Also known as gypsum partition blocks, used for lightweight, fire-resistant interior partitions
    • Structural Clay Tile: Hollow masonry units open at two ends with interior webs dividing into longitudinal cells

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Module 1 - Materials of Construction - Building Technology (Atlas)

    More Like This

    Masonry and Mortar Types
    18 questions
    Mortar Specifications and Mix Types
    5 questions
    Use Quizgecko on...
    Browser
    Browser