Jul 16, 2014· Aggregate impact value test gives an indication of aggregate's toughness property (i.e. property of a material to resist impact) Aggregate impact values are used to classify the stone aggregates with respect to toughness property as given below. Aggregate impact value (%) Toughness Properties <10 Exceptionally tough / Strong 10 – 20 Very tough / Strong […]

Concrete Mix Design: Illustrative Example M30 Grade (M20 ...

Concrete mix design is a procedure of selecting the suitable ingredients of concrete and their relative proportions with an objective to prepare concrete of certain minimum strength, desired workability and durability as economically (value engineered) as possible.

Cement » Civil Engineering Home for Civil ...

Civil Engineering Home for Civil Engineers. – "Civil Engineering Home for Civil engineers" is a journal to bring civil engineering theory and construction practices online to share with fellow engineers, contractor and civil engineering student around the world.

Designing and Proportioning Normal Concrete Mixtures ...

Designing and Proportioning Normal Concrete Mixtures ... material ratio selected for mix design must be the lowest value required to meet anticipated exposure conditions. ... ability and placeability of the concrete. Sometimes mid-sized aggregate, around the 9.5 mm (3 ...

Chapter 8 Design of Concrete Mixes

Chapter 8 Design of Concrete Mixes Total 60 Chapter 5 Concrete Mix Design ... Stage 5 deals with the selection of the "fine and coarse aggregate contents" The mix design form shown in Table 1 is sub-divided into the same five ... • If no information is available assume a value of 2.6 for uncrushed aggregate

Concrete Mixture Shrinkage Potential| Concrete ...

Concrete shrinkage can significantly impact the performance of slabs. Countless slab investigations for nationwide retail distribution firms have shown that a single mix or slab design does not provide consistent performance in different regions of the country. Concrete is made from locally-available materials and these materials determine the ...

Exp 4 Aggregate Impact Value - Civil Engineers PK

Experiment No. 4: Determination of the aggregate impact value of different coarse aggregate samples. (BS 812) Scope & significance: Aggregate Impact Value The aggregate impact value gives a relative measure of the toughness or the resistance of aggregate sudden shock or impact is not proportional to the resistance to a slowly applied compressive load.

Specific Gravity of Coarse Aggregate -Procedure [2019]

Apr 24, 2019· For concrete, asphalt or any mix design where aggregate is used. By specific gravity, we can guess its quality like Aggregate impact value, Abrasion, Bulk density, etc.. Specific Gravity of Coarse Aggregate IS Code. IS Code for Aggregate specific gravity is IS 2386 part 3. Apparatus and Tools Required for Aggregate specific gravity test

How Coarse Aggregate Affects Mix Design of Concrete?

Coarse aggregate is one of the essential components of concrete and occupies the largest volume in the mix. That is why it greatly affects the concrete mix design. Its properties such as strength, maximum size, shape, and water absorption influence water demand, the quantity of cement and fine ...

Designing Concrete Mixtures - University of Memphis

Designing Concrete Mixtures There are three phases in the development of a concrete mixture: specifying, designing, and proportioning ACI Mix Design The most common method used in North America is that established by ACI Recommended Practice 211.1 Any mix design procedure will provide a first approximation

Concrete Mix Design | Different Grades of Concrete

May 17, 2017· Concrete Mix Design:-Concrete is a composite mixture which consists of Cement, Sand and Aggregate. Concrete mix design is the procedure for finding the right quantities of these materials to achieve the desired strength. Accurate concrete mix design makes concrete …


The outcome of this research is aimed to supplement the numerous available literature works and to assist and guide the selection of appropriate specification requirement for aggregate properties value in concrete mix design.


Aggregate Impact Value Test Total 54 17 aggregates counter Hammer . 4.5 Physical Properties ... determined in making calculations of mix design of concrete. Total 54 18 . 4.5.2 Porosity and Absorption of Aggregates • The porosity of aggregate, its permeability, and absorption influence the bonding between aggregate and cement


Oct 01, 2016· The aggregate crushing strength value is a useful factor to know the behavior of aggregates when subjected to compressive loads. Also read: Crushing Value Test of Aggregates. 13. Impact Value. The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact.

principles of concrete mix design.ppt - ACC Help

Concrete Mix Design -Definition Concrete mix design is defined as the appropriate selection and proportioning of constituents to produce a concrete with pre-defined characteristics in the fresh and hardened states. In general, concrete mixes are designed in order to achieve a defined workability, strength and durability .

7 Lab Test on Aggregates that we Use in Concrete Construction!

The crushing test on aggregate gives a relative measure of the resistance of an aggregate crushing under gradually applied compressive load. If the aggregate crushing value is less than 10, it signifies an exceptionally strong aggregate. Whereas, if the crushing value is 35 or above, it would normally be considered as weak aggregates.


The effects of aggregate type, size, and content on the behavior of normal and high-strength concrete, and the relationships between compressive strength, flexural strength, and fracture energy are discussed. The concrete mixtures incorporate either basalt or crushed limestone, aggregate sizes of 12 mm ('h in.) or 19 mm (:Y. in.), and

Impact of course aggregate on mix design of concrete

Coarse aggregate is considered as one of the vital elements of concrete and captures the major volume in the mix as well as impacts the concrete mix design significantly. Its different characteristics like strength, maximum size, shape, and water absorption affect water demand, the quantity of cement and fine aggregate in concrete mixture.

Mix Design and Pumped Concrete - Civil Engineering

Mix Design and Pumped Concrete Posted in Mix Design, Research Papers ... A simple method of concrete mix design for pumpable concrete based on an estimated weight of the concrete per unit volume is described in the paper. ... length of line, pressure used to move the concrete, moisture content of aggregate at the time of mixing, truck-haulage ...

Aggregate in Concrete - The Concrete Network

Recycled concrete will have a higher absorption and lower specific gravity than conventional aggregates. To produce good quality, durable concrete containing a portion of recycled concrete aggregate often requires trial concrete mixes and close monitoring of the properties of the old recycled concrete, with mix adjustments made, as needed.

Concrete and Aggregate Testing – Getlab

Our concrete and aggregate section is fully equipped to conduct a wide range of tests on concrete and aggregates. These include; CONCRETE •Concrete cube strength •Slump test •Schmidt rebound hammer •Concrete mix design. AGGREGATE •Aggregate Crushing Value (ACV) •Aggregate Impact Value (AIV) •10% fines value (TFV)

Aggregate Crushing Value Test – Determine Aggregate ...

Concept and significance of the Aggregate crushing value test. The ' aggregate crushing value test ` gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Aggregate crushing value is defined as the percentage by weight of the crushed (or finer) material obtained when the test aggregates are subjected to a specified load under ...