By Irving Kett
As each civil engineer understands, Portland Cement is the main flexible and critical fabric of building, and may most likely stay up to now into the long run. but few books, if any, exist that provide an in-depth research of the blending and trying out equipment of this important hydraulic cement.
This assertion, written concerning the first version of Engineered Concrete: combine layout and try Methods, is still as precise this present day because it was once ten years in the past. Revised and up-to-date, the second edition of this groundbreaking source thoroughly covers Portland Cement, Portland Cement Concrete, and their uses.
See what s new within the moment Edition:
• New insurance of the most recent concrete applied sciences resembling high-performance and light-weight concrete
• numerous new exams and pattern tear sheets
• extra and up to date information sheets
The physique of the booklet is split into numerous sections, with the 1st explaining how concrete batches are designed, combined, and measured for numerous consistencies. one other part info the assessments of the first part fabrics of concrete except water specifically Portland Cement, aggregates, and mortar whereas the ultimate part contains a few of the primary concrete checking out strategies for various energy parameters in conformity with the factors of the yankee Society for trying out fabrics.
Solidly researched and written, the ebook offers a basic realizing of cement, concrete, and combining and trying out equipment that permit readers to provide the main low in cost combos of concrete fabrics and fulfill functionality necessities and requisites.
Read or Download Engineered Concrete Mix Design and Test Methods (2nd Edition) (Modern Concrete Technology Series) PDF
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Additional info for Engineered Concrete Mix Design and Test Methods (2nd Edition) (Modern Concrete Technology Series)
Example text
The unit weight so determined is necessary for the design of a concrete mixture by the absolute value method as explained beginning on pages 14 and 23, depending on the system of measurement. 1 lb) with a range to at least 25 kg (64 lb) • Straight steel tamping rod 16 mm (⅝ inch) in diameter and about 60 cm (24 inches) in length with one end rounded in a hemispherical tip • Watertight metal bucket having approximately equal height-to-diameter ratio, but the height should always be between 80 to 150% of the diameter • Quantity of oven dry aggregate sample should be at least 125% of the quantity required to fill the metal pail Test Procedure 1.
The latter is found by subtracting the volume of the air, cement, coarse aggregates, and water from a cubic meter to estimate the fine aggregate quantity in the batch. 4 = 1042 lb Total weight of all the ingredients in the 1-cubic-yard concrete batch = 450 lb (cement) + 2549 lb (coarse aggregates) + 1042 lb (fine aggregates) + 180 lb (water) = 4221 lb A moisture correction at this point is needed to compensate for the moisture in the aggregates above that present for the SSD condition. 05 = 90 lb Cement = 450 lb Total materials after water adjustment remains the same: 4221 lb Assume that all the allotted water was used in the mixing process and that the slump was within specified limits.
Computations: Record the maximum compressive load and compute the compressive strength in pascals or pounds/square inch. 2. Data Sheet: The following data sheet should be used to record findings. Data Sheet (ASTM Designation: C 109) Specimen No. 1 2 3 4 5 6 Time of Loading in Seconds Total Load in kg or Pounds Specimen Cross Section in Meters2 or Inches2 Specimen Strength in Pascals or psi Specific Gravity and Absorption Tests of Coarse and Fine Aggregates for Use in the Design of Portland Cement Concrete Mixtures (ASTM Designations: C 127 and C 128) Purpose Determine the bulk and apparent specific gravities, and absorption of coarse and fine aggregates.