section 03300 - paulding,a. concrete classification 1. use class a for all reinforced concrete unless noted otherwise within the scope of aci 318 or aci 350. 2. use class b concrete for items such as pipe cradles, pipe and conduit encasement, bedding, collars, thrust blocks and non-reinforced concrete. 3. if class is not otherwise identified, provide class a concrete..concrete durability requirements based on aci-318-19,the aci 318-19 set durability demand for concrete based on the category exposure and class exposure of the structure, dependent on the ground and weather situation of the area. each exposure category contains different class exposure. the class exposure describes the degree of severity of the condition of the environment..new surface finishes for as-cast formed concrete | for,surface tolerance class a as specified in aci 117; provide mockup of concrete surface appearance and texture form-facing material requirements..class a finish and class b finish,unless painting of. surfaces is required, uniform color of the concrete shall be maintained by. use of only one mixture without changes in materials or proportions for any. structure or portion of structure that requires a class a or b finish. except for major defects, as defined hereinafter, surface defects shall be..
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designate class of surface (a, b, c, d) (also refer to aci 301 and 347): class a: for surfaces prominently exposed to public view where appearance is of special importance; class b: coarse-textured, concrete-formed surfaces intended to receive plaster, stucco, or wainscoating; class c: general standard for permanently exposed surfaces where other finishes are not specified; and class d: minimum quality surface where roughness is not objectionable, usually applied where
aci method of concrete mix design is based on the estimated weight of the concrete per unit volume. this method takes into consideration the requirements for consistency, workability, strength and durability. this article presents aci method of concrete mix design. 1.
8.4—finishing class 1, 2, and 3 floors 8.5—finishing class 4 and 5 floors 8.6—finishing class 6 floors and monolithic-surface treatments for wear resistance 8.7—finishing class 7 floors 8.8—finishing class 8 floors (two-course unbonded) 8.9—finishing class 9 floors 8.10—toppings for precast floors 8.11—finishing lightweight concrete
the downloadable aci training materials follow. aci concrete flatwork finisher and technician certification. chapter 1 – planning for slab-on-ground placement. chapter 2 – concrete materials, mixture proportioning, and control tests. chapter 3 – preparation before placing concrete. chapter 4 – floor flatness and levelness.
aci mix design 6. calculation of cement content-- once the water content and the w/c ratio is determined, the amount of cement per unit volume of the concrete is found by dividing the estimated water content by the w/c ratio. weight of water weight of cement wc mix design procedures however, a minimum cement content is required to
exposure category s (sulfate exposure) is subdivided into four exposure classes: exposure class concrete exposure characteriscs s0 condibons where the water-soluble sulfate concentraon in contact with concrete is low and injurious sulfate aack is not a concern. s1 structural concrete members in direct contact with soluble sulfates in soil or water.
a change in the type of concrete or a major increase in the strength level may increase the sample standard deviation. such a situation might occur with a change in type of aggregate (i.e., from natural aggregate to lightweight aggregate or vice versa) or a change from non-air-entrained concrete to air-entrained concrete.
* the odot qct class does not include the aci concrete field testing technician - grade 1 certification, which is required. please remember to register for the aci class separately. aci concrete field testing technician grade 1. april 23-24,
as the title “specifications for tolerances for concrete construction and materials (aci 117)” implies, the tolerances given are standard or usual tolerances that apply to various types and uses of concrete construction. they are based on normal needs and common construction techniques and practices.
american concrete institute method of mix design 11.3 (aci concrete mix design) this method of proportioning was first published in 1944 by aci committee 613. in 1954 the method was revised to include, among other modifications, the use of entrained air. in 1970, the method of aci mix design became the responsibility of aci committee 211.
concrete field 1 - aci / mndot cert description. this concrete field 1 class offers certifications for both aci and mndot. the certification you would like to receive will be indicated by the fee level you select when you register (m - mndot only or a - aci & mndot).the course is for those who produce, test, and inspect portland cement concrete.
aci grade 1 field testing certification practice test . astm c 1064 . standard test method for temperature of freshly mixed hydraulic – cement concrete . 1. for concrete with aggregates less than 3 inches, the thermometer must remain in the fresh concrete sample a minimum of 5 minutes or until the temperature reading stabilizes. (t or f) 2.
the 9-page document is available from american concrete institute, box 19150, detroit, michigan 48219, for $3.90 (aci members, $2.80) plus $1 shipping and handling in the u.s. or $2 elsewhere. more about american concrete institute
“n” class is exposed to neither chlorides nor freezing and thawing. 4. “a” class pertains to agricultural, municipal or industrial projects exposed to human or animal wastes. 5. all classes of concrete, exposed to sulphates, shall comply with the minimum requirements of “s” class noted in tables 2 and 3.
1) review class for aci concrete field testing technician - grade i a concrete field testing technician—grade i , you can become one by demonstrating the knowledge and ability to properly perform and record the results of seven basic field tests on freshly mixed concrete in accordance with the following astm standard methods or procedures: c-172, c-143, c-231, c-173, c-138, c-31, and c
• two classes of lap splices are specified by the aci code. the minimum lengthls not less than 12 inches is: class a: ls = 1.0 ld class b: ls = 1.3 ld aci sect. (12.15) the the work sheet provided in the next page of tension lab splices.
aci 318-14 section 126.96.36.199 or aci 318-11 section 12.3.2. the minimum compression development length shall not be less than 8 inches. for compatibility with older aci codes, Ψr is taken as 1.0. this factor pertains to confinement of the rebar and may be taken as 0.75 subject to certain conditions set in table 188.8.131.52 of aci 318-14 (e.g. if ties used are spiral).
weigh the container with the concrete (2) - record value to nearest tenth of a pound. subtract the empty container weight from the full container weight (2) - (1) = weight of concrete (3) divide the weight of concrete by the known volume (3) / (4) = density, or fresh unit weight. there are a few unique procedures listed in the astm c138 to
other properties of the concrete (see aci 212.3r). de-pending upon the type and amount, certain cementitious materials such as fly ash, (see ac226.3r) naturali pozzolans, ground granulated blast-furnace (ggbf) slag (see aci 226.1r), and silica fume may be used in con-junction with portland or blended cement for economy or to
virginia ready mixed concrete association 250 west main street • suite 100 charlottesville, virginia 22902 (434) 977-3716 • (434) 979-2439 fax
certification review session & exam for the aci concrete field testing technician grade 1. this certification class begins with a review session (this is not instructional - this is a review of material you should have previously studied) followed by the written examination.
1. odot 499 class c (astm class a) concrete fo r all concrete work except as noted below or elsewhere in these specifications. a. 4,000 psi compressive strength at 28 days. b. type ii cement plus dispersing agent and air. c. max. (water)/(cement and dispersing agent) ration = 0.45. d. min. cement content = 564 lbs. (6.0 bags)/cu. yd. concrete. e.
laboratory testing technician level 2 certification: a concrete laboratory testing technician – level 2 is an individual who has demonstrated the knowledge and ability to properly perform, record, and report the results of advanced laboratory procedures for aggregates and concrete. a current certification as an aci concrete laboratory testing technician level 1 is required as a prerequisite to obtaining this
the textbook is “concrete fundamentals” and is one of a series published by the american concrete institute (also known as a aci). the series is called the “concrete craftsman series' and the specific designation for the “concrete fundamentals” book is ccs–0(16). this book is available from either aci or directly from the tennessee concrete association (tca).
as 3610.11 – formwork for concrete this standard deals with the visual quality (appearance) of formed concrete surfaces, for both in-situ and precast concrete elements. the surface finish quality is specified as one of five classes. classes 1, 2 and 3 are typical architectural applications where the concrete surface visual quality is important.
aci 318m-14 equation 184.108.40.206 or aci 318m-11 equation 12-1. the minimum compression development length shall not be less than 200mm. for compatibility with older aci codes, Ψr is taken as 1.0. this factor pertains to confinement of the rebar and may be taken as 0.75 subject to certain conditions set in table 220.127.116.11 of aci 318-14 (e.g. if ties used are spiral).
aci certification class “tradesman” with concrete. this course is the perfect opportunity to provide your crew in-depth training without pressures and constraints faced on a real job-site. this two-day course will include classroom, hands-on training, and a practical hand-on exam for attendees to become a certified aci concrete flatwork tradesman.
aci. aci concrete field testing technician - grade 1. register here. for all personnel involved in testing fresh concrete. astm c94 and aci 301 require technicians to have demonstrated an ability equivalent to aci concrete field testing technician-grade i certification. a half day review, with exams administered the following day, is sponsored