Mar 29, 2015· Example • Design a concrete mix from the following data by I.S. method • Target mean Strength= 35 N/mm2 • Maximum Size of Aggregate = 20 mm • W/C ratio = 0.43 • Water required per m3 of concrete= 190 kg • Sand as percentage of total aggregate by absolute Volume = 35 % • Entrapped air in concrete= 2 % • Sp gravity of Cement= 3.15 ...

A steady supply of pumpable concrete is necessary for satisfactory pumping.1 A pumpable concrete, like conventional concrete, requires good quality control, i.e., uniform, properly graded aggregate, materials uniformly batched and mixed thoroughly.2 Concrete pumps are available with maximum output capacities ranging from 15 to 250 yd 3/hr ...

Gravel, cobble and boulders come under this category. The maximum size aggregate used may be dependent upon some conditions. In general, 40mm size aggregate used for normal strengths and 20mm size is used for high strength concrete. the size range of various coarse aggregates given below.

Fine Aggregate grading- As per IS-383 [12] and Morth Table, the Banas Sand of zone – II was recommended for optimization of concrete mix.The Sieves recommended for Gradation of Banas Sand are 4.75mm, 2.36mm, 1.18mm, 600 micron, 300 micron and 150 micron.

feasibility of using an aggregate with some material of larger size. The maximum size possible will depend on the minimum section thickness of the concrete block. Obviously the diameter of the largest particle must be less than the thickness of the web of face shells. One recommendation for combined aggregate specifies passing the 3/8 inch

Fineness modulus of sand (fine aggregate) is an index number which represents the mean size of the particles in sand. It is calculated by performing sieve analysis with standard sieves. The cumulative percentage retained on each sieve is added and subtracted by 100 gives the value of fineness modulus.

The goal for the new 47BR Combined Aggregate Gradation is to have the contractor, with agency oversight, develop a concrete mix design with an optimum combined aggregate gradation and provide the Contractor with the testing and control responsibilities to ensure a quality product.

4.5.2 Fine aggregate concrete coverage for FP300 shall net 100 ft 2 /yd 3 (see section 2.3). 4.5.3 Fine aggregate concrete shall be pumped in such a manner that excessive pressure on the fabric forms is avoided. Consultation with the fabric form manufacturer with regard to the selection of grout/concrete pumps is recommended.

Nov 05, 2018· Pumping pressure is reduced by designing a pumpable concrete mixture, with particular attention to optimizing the combined aggregate gradation to reduce either harshness or 19. PLACING CONCRETE BY PUMPING METHODS 304.2R-19 over-sanding, and to reduce the amount of water required to maintain workability.

Wall gage. 1 4. 1 4. 5 / 3 2 " gates (ASTM C 33) as closely as pos- When combined with the ce-.get price. 1.1.2.1HOW TO MAKE PUMPABLE CONCRETE WITH SAND FM 3.25 - Aggregate . GRADATION SIEVE SIZE % RETAINED For making concrete pumpable, there are several factors to be considered as below: 1. ...

Aug 11, 2018· Gravel, cobble and boulders come under this category. The maximum size aggregate used may be dependent upon some conditions. In general, 40mm size aggregate used for normal strengths and 20mm size is used for high strength concrete. The size range of various coarse aggregates given below: Fine gravel: 4mm – 8mm. Medium gravel: 8mm – 16mm

Note: All concrete weights based on 150 lb per ft 3 . Fig. 7—Truck engine-driven concrete pump PLACING CONCRETE BY PUMPING METHODS 304.2R-7 mantling will aid in lowering line resistance by preventing the. concurrently with concrete placing. Also, other

21.50 li 50 kg 65.79 kg 131.21 kg Example Design a concrete mix from the following data by I.S. method Target mean Strength= 35 N/mm2 Maximum Size of Aggregate = 20 mm W/C ratio = 0.43 Water required per m3 of concrete= 190 kg Sand as percentage of total aggregate by absolute Volume = 35 % Entrapped air in concrete= 2 % Sp gravity of Cement= 3 ...

9.4— Proportioning pumpable concrete 9.5— Field practice 9.6— Field control Chapter 10— Conveying concrete, p. 304R-30 ... gradation of aggregate as it enters the concrete mixer should ... combined aggregate. When specification limits for grading

4.5.2 Fine aggregate concrete coverage for US400 shall net 75 ft 2/yd3 (see Section 2.3). 4.5.3 Fine aggregate concrete shall be pumped in such a manner that excessive pressure on the fabric forms is avoided. Consultation with the fabric form manufacturer with regard to the selection of grout/concrete pumps is recommended.

Mobile Crushing Plant Manufacturers In India. Mobile Crusher Manufacturers In India,Rock Cone Crusher SupplierFounded in 1997, TON Group is a stone crusher,mobile stone crusher manufacturer stone crushing plant,with a complete line of crushing, grinding and As a global leading manufacturer of products and services for the mining industry, our company can provide you with advanced

Jan 29, 2020· Aggregate size can also impact pumpability, of course, though most pumps can handle up to 2-inch aggregate. As long as pumpers have a 5-inch system, says Brown, they shouldn't run into issues. ACI 304.2R, Guide to Placing Concrete by Pumping Methods, recommends the maximum size of angular coarse aggregate should be no more than one-third the ...

The difficulties with using light-weight aggregate in concrete to be pumped are observed when surface of aggregate is not sealed as water demand of the mix increased greatly. When pressure is exerted by pump, the air voids in the aggregate get contracted. Water from the mix enters into the aggregate pores raising water demand.

4.5.2 Fine aggregate concrete coverage for FP300 shall net 100 ft 2 /yd 3 (see section 2.3). 4.5.3 Fine aggregate concrete shall be pumped in such a manner that excessive pressure on the fabric forms is avoided. Consultation with the fabric form manufacturer with regard to the selection of grout/concrete pumps is recommended.

C666/C666M Test Method for Resistance of Concrete to Rapid Freezing and Thawing. C1778 Guide for Reducing the Risk of Deleterious Alkali-Aggregate Reaction in Concrete. D75/D75M Practice for Sampling Aggregates. D422 Test Method for Particle-Size Analysis of Soils. D2419 Test Method for Sand Equivalent Value of Soils and Fine Aggregate

ASTM C33 Size Number 7 is an acceptable equivalent to the Type CA 1 gradation. ASTM C33 Size Number 57 is an acceptable equivalent to the Type CA 2 gradation. Material passing the 75 µm sieve (wet) is limited to a maximum 1.0 % by mass for ASTM sizes 7 and 57. 2. Friction.

Correct selection of aggregate size and gradation, along with adjustments in paste rheology is essential for SCC. ... With the advent of more fluid concretes (pumpable concrete, self-levelling concrete), it was necessary to measure the flow properties of concrete. ... Table 3. A combined effect for proportioning SCC using the principles of ...

Mar 29, 2015· Example • Design a concrete mix from the following data by I.S. method • Target mean Strength= 35 N/mm2 • Maximum Size of Aggregate = 20 mm • W/C ratio = 0.43 • Water required per m3 of concrete= 190 kg • Sand as percentage of total aggregate by absolute Volume = 35 % • Entrapped air in concrete= 2 % • Sp gravity of Cement= 3.15 ...

Updated Specifiers Guide to Pervious Concrete v1.2.11 - Free download as PDF File (.pdf), Text File (.txt) or read online for free. bkj k

Jan 01, 2016· The coarse aggregate used had a maximum aggregate size of 10 mm, a specific gravity of 2.65, and a fineness modulus of 5.70. As fine aggregate, washed crushed sand with a specific gravity of 2.62 and a fineness modulus of 2.77 was employed. The coarse and fine aggregates used in this study conformed to the gradation specifications of ASTM C33.

Jan 01, 2016· The coarse aggregate used had a maximum aggregate size of 10 mm, a specific gravity of 2.65, and a fineness modulus of 5.70. As fine aggregate, washed crushed sand with a specific gravity of 2.62 and a fineness modulus of 2.77 was employed. The coarse and fine aggregates used in this study conformed to the gradation specifications of ASTM C33.