curing of concrete - its methods, time, & requirements.,this process is also called bleeding of concrete. after placing of concrete, the water starts bleeding from concrete and rises from its pores. after rising of water, evaporation take place, and the water starts disappearing from the surface due to evaporation. bleeding of concrete depends on many factors like thickness, length, temperature, etc..glossary of construction terms,concrete the mixture of portland cement, sand, gravel, and water. used to make garage and basement floors, sidewalks, patios, foundation walls, etc. it is commonly reinforced with steel rods (rebar) or wire screening (mesh). condensate line.
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water cement ratio for different ratio of concrete the amount of water for 50kg of cement is concrete ratio water quantity 1:3:6 34 liter 1:2:4 30 liter 1:1.5:3 27 liter 1:1:2 25 liter • in the preparation of concrete the water cement ratio is very important • for normal construction the water cement ratio is usually 0.5 • adding to much water will reduce the strength of concrete and can
composition of cement. introduction portland cement gets its strength from chemical reactions between the cement and water. the process is known as hydration.this is a complex process that is best understood by first understanding the chemical composition of cement.
concrete terminology. to access the concrete dictionary, click on any of the letters to visit the corresponding alphabetical section of concrete terminology. please click on the corresponding letter: a b c d e f g h i j k l m n o p q r s t u v w x y z.
rebar rules for distance to edge of concrete: minimum concrete cover: concrete cast against and permanently exposed to earth: 3' formed concrete exposed to earth or weather: #5 bar and smaller: 1 1/2' formed concrete exposed to earth or weather: #6 through #18 bars: 2' formed concrete not exposed to earth or weather: slabs, walls, joists: #14 & #18 bars: 1 1/2'
both shuttering and formwork are terms used to describe the process of fabricating concrete molds. these molds are used to hold the concrete in place until it hardens. some contractors use the two terms interchangeably, but in most cases, shuttering is thought of as a
types of concrete forms the different types of concrete forms used in concrete casting are: wooden forms; insulated concrete forms; foam concrete forms; concrete wall forms; steel forms; 1. wooden forms wooden form is the basic and the most conventional type of concrete form. it is employed mainly for concrete casting that does not exceed 6 inches of height.
construction terminology cheat sheet planning assignable square footage (asf) usable square footage within a physical space (measured from finished wall to finished wall). addendum (addenda) written information adding to, clarifying or modifying the bidding documents. an addendum is generally issued by the owner to the
monocrete construction: a construction method that uses precast concrete panels which are bolted together to make concrete structures. 62. negotiated procurement: a government procurement method where a contractor is chosen without formal price competition or formal advertising. 63.
concrete 101: all about rebar. commercial concrete, concrete driveways, concrete floors, concrete foundations, concrete retaining walls, concrete sidewalks, concrete traffic circles, residential concrete. rebar, or reinforcing bar, is a common feature of many concrete applications. its primary purpose is to increase the tensile strength of the
the standard for designing a concrete mix is aci 211.1, proportions for normal, heavyweight, and mass concrete. like most aci committee reports, this document is excellent, albeit highly technical. if you want more detail, written in a more user-friendly way, get a copy of the portland cement association's design and control of concrete mixtures ; that's the bible for concrete mix design.
mixing, transporting, and handling of concrete should be carefully coordinated with placing and finishing operations. concrete should not be deposited more rapidly than it can be spread, struck off, consolidated, and bullfloated and deposited continuously as near as possible to its final position.
101- definitions and terms change order - a written order the engineer issues to the contractor and both parties sign, which sets forth any contract change(s). once both parties execute it, the change order becomes a part of the contract. cleanup time (cleanup working days) – the number of working days following the contract time
culinary terms: q-t. q. quadriller ( v.) - to make criss-cross lines on the surface of food, as part of food presentation. quatre-epices ( n.) - literally meaning 'four spices,' a finely ground mixture of generally pepper, cinnamon, nutmeg, ginger, or cloves, used to season vegetables, soups, and stews.
form - temporary structure erected to contain concrete during placing and initial hardening. foundation - the supporting portion of a structure below the first floor construction, or below grade, including the footings. foundation ties - metal wires that hold the foundation wall panels and rebar in place during the concrete
core & shell: a term that refers to the base construction of a building. this includes its structure, cladding, and vertical systems, such as mep utility risers, stairs, and elevators, as well as its finished common areas, such as lobby and restrooms.
in its simplest form, concrete is a mixture of paste and aggregates, or rocks. the paste, composed of portland cement and water, coats the surface of the fine (small) and coarse (larger) aggregates. through a chemical reaction called hydration, the. concrete technology, lab-notes. by haseeb jamal - jun 08, 2017.
26. monocrete construction: the monocrete construction method is the sole use of precast concrete panels, bolted together, to create concrete structures. 27.
shotcrete: quick-setting concrete is sprayed onto the bare rock surface immediately after : excavation. it forms preliminary tunnel liner. > slurry wall : construction method used in wet, unstable soil. as the trench is excavated, it is filled with bentonite slurry.
multiply the length (10 ft.) by the width (10 ft.) by the depth (.35 ft., or 4 in.) and divide it by 27 (the number of cubic feet in a cubic yard). you get 1.3 cu. yds. then add 10 percent to allow for spillage and slab depth variations to help determine the concrete cost per yard.
traditionally, concrete mixes have been identified in terms of the ratio of cement to fine aggregate to coarse aggregate. for example, the ratio 1:2:4 refers to a mix which consists of 1 cu. ft. of cement, 2 cu. ft. of sand and 4 cu. ft. of gravel.
terminology: concrete strength properties and why they are important compressive strength of concrete. this is the most common and well-accepted measurement of concrete strength to assess the performance of a given concrete mixture. it measures the ability of concrete to withstand loads that will decrease the size of the concrete.
lap is defined as the horizontal distance between the vertical joints in successive courses. a lap length of one-fourth brick length is said to be a good lap in brick masonry. 12. closer in brick masonry. a closer is defined as a piece of brick that is used to close up the bond at the end of the brick masonry course.
101.07 business day monday through friday except for holidays in accordance with 101.26. 101.08 calendar day every day shown on the calendar. 101.09 change order a written order issued to the contractor covering changes in the contract and establishing payment for the work affected by the changes. 170 101.03
concrete block. the least-expensive option for basement construction involves the use of concrete blocks or masonry. the walls are made of cinder blocks and can be constructed in a fraction of the time it takes to create a poured concrete wall. steel