About Us

Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together. The Headquarter is located in HI-TECH Industry Development Zone of Zhengzhou and covers 80000 m ². Another workshop in Shangjie Industry Park covers 67000 m ². Over the more than 30 years, our company adheres to modern scientific management system, precision manufacturing, pioneering and innovation. Now LIMING has become the leader in domestic and oversea machinery manufacturing industry.

120

million

cubic meters

Industrial chain production base

70

national patents

689sets

national patents

170

Equipment service country

Company Culture

core values of the company

Create Value

Share Value

Observe Order

Respect Value

Service philosophy

Religious, fine, tight, and harmonious

LIMING spirit

Standardization, value, serialization, and differentiation will always exceed our contract

Brand Concept

Create and promote civilization, refine and interpret brilliantly

Business philosophy

Religious, meticulous, rigorous, and harmonious work

Our Global Footprint

Case Scene

Trial Mix - Concrete Testing • The Omega Group

Trial Mix. It's important to get the right mix for your concrete. The purpose of concrete trial mixes is to enable you to check the strength, workability, density and other properties of concrete mixes. Trial mixes are often undertaken when new materials or admixtures are to be used. Trials are also undertaken when setting up batch data. Trial mixes can help you maximize all the materials in the mix and is

Concrete Trial Mix Procedure Concrete Trial Mix Design

The estimated mix proportions should be examined through trial batches. The quantity of material should be adequate for minimum three 150 mm size cube concrete samples. When trial mix is necessary, the Number of laboratory or site mixed batched should be mentioned or agreed among the purchaser and producer with the materials which should be used for the work.

REQUIREMENTS FOR CONCRETE MIX DESIGN - The

Characteristic strength of concrete required: Characteristic strength is the strength of concrete below which not more than 5% of test results of samples are expected to fall. This can also be called as the grade of concrete required for mix design.

Lab 1 – Concrete Proportioning, Mixing, and Testing

Students make concrete according to the mix design. Slump and Kelly Ball testing would be performed to investigate workability of mixture. Six cylinders would be cast for calculating compressive stress of concrete specimen.

Method Statement for Concrete Sampling and Testing ...

Any one test result is not less than 85% of the final trial mix strength for that class of concrete. The average of any 6 successive test results for the same class of concrete is not less than 90% of the final trial mix strength for that class. No single cube result is less than 75% of the final trial mix strength for that class of concrete.

Method Statement for Concrete Sampling and Testing ...

Any one test result is not less than 85% of the final trial mix strength for that class of concrete. The average of any 6 successive test results for the same class of concrete is not less than 90% of the final trial mix strength for that class. No single cube result is less than 75% of the final trial mix strength for that class of concrete. All the tests

REQUIREMENTS FOR CONCRETE MIX DESIGN - The

Requirements of concrete mix design should be known before calculations for concrete mix. Mix design is done in the laboratory and samples from each mix designed is tested for confirmation of result. But before the mix design process is started, the information about available materials, strength of concrete required, workability, site conditions etc. are required to be known.

TRIAL AND ERROR METHOD OF CONCRETE MIX

In another method of trial mix fine aggregate and coarse aggregate are combined in several proportions. The quantity of cement per unit volume of concrete is found to give a certain water-cement ratio for each mixture. The percentage of sand is known as optimum percentage.

M30 Grade of Concrete Mix Design Procedure with OPC

Concrete Quantity Required for Trial Mix. Volume of 1 cube mould = 0.150 x 0.150 x 0.150 = 0.003375 cum. so concrete quantity for 1 cube = 0.003375 cum. concrete quantity for 12 cubes = 0.003375 x 12 = 0.0405 cum. We should take a little more quantity of concrete because it will stick on a trial mix drum and slump test purposes.

Lab 1 – Concrete Proportioning, Mixing, and Testing

If the slump is less than required, return the concrete to the mixer, add the remaining water, and mix for one minute. Perform a second slump test. If results are satisfactory, go on to step 10. If the slump is still less than required, return the concrete to the mixer, add additional water, as well as additional Portland cement to maintain the desired water/cement ratio (Wt. of PC added = Wt ...

mawar khayalan: Method Statement -Concrete Mix (Site

07/12/2013  10.3 Before carry out the site mix, a trial site mix approximately 1m 3 of mix concrete shall be batched based on approved design mix to required grade of concrete to check workability of mix and compressive strength. A set six (6) 150mm concrete test cubes, 3 for testing at 7 days and 3 for testing at 28 days will be made and tested to achieve as per required target mean strength.

Mix Design Of Concrete Concrete Mix Design M 25

14/01/2019  Data Required for Concrete Mix Design i. Concrete Mix Design Data (a) Characteristic compressive strength of concrete required at end of 28 days = M 25 (b) Nominal maximum size of aggregate used = 20 mm (c) Shape of Coarse Aggregate = Angular (d) Required workability at site = 50-75 mm (slump Value) (e) Quality control is done by as per IS: 456 (f) Type of exposure Condition of concrete

Guide to Evaluation of Strength Test Results of Concrete

applicable to the compressive strength test results required by ACI 301, ACI 318, and similar specifications and codes. Statistical concepts described are applicable for the analysis of other common concrete test results, including flexural strength, slump, air content, density, modulus of elasticity, and other tests used for evaluating concrete and ingredient materials. This guide assumes ...

7 Methods for Testing Concrete Strength For

11/06/2019  4. Pullout Test (ASTM C900) Method: The main principal behind this test is to pull the concrete using a metal rod that is cast-in-place or post-installed in the concrete

SECTION 03 30 00, CAST-IN-PLACE CONCRETE

Test Report for Concrete Mix Designs: Trial mixes including watercement // fly ash // ratio curves, concrete mix ingredients, and admixtures. Shoring and Reshoring Sequence: Submit for approval a shoring and reshoring sequence for flat slab/flat plate portions, prepared by a registered Professional Engineer. As a minimum, include timing of form stripping, reshoring, number of floors to be re ...

Buildings - Concrete Testing Requirements

Concrete Testing Requirements . Applicants cannot identify responsibility or certify completion for the concrete inspection and design mix items on the TR1.Applicants must complete two Technical Reports (TR2 and TR3 Forms) to identify information about the testing labs, the strength and mix of the concrete being used.TR2: Concrete Pouring, Sampling and Compression Test Cylinders

Mix Design Of Concrete Concrete Mix Design M 25

14/01/2019  Data Required for Concrete Mix Design i. Concrete Mix Design Data (a) Characteristic compressive strength of concrete required at end of 28 days = M 25 (b) Nominal maximum size of aggregate used = 20 mm (c) Shape of Coarse Aggregate = Angular (d) Required workability at site = 50-75 mm (slump Value) (e) Quality control is done by as per IS: 456 (f) Type of exposure Condition of concrete

Guide to Evaluation of Strength Test Results of Concrete

applicable to the compressive strength test results required by ACI 301, ACI 318, and similar specifications and codes. Statistical concepts described are applicable for the analysis of other common concrete test results, including flexural strength, slump, air content, density, modulus of elasticity, and other tests used for evaluating concrete and ingredient materials. This guide assumes ...

STRUCTURE magazine Ensuring Quality Concrete

Test results or trial data, mill reports for cement, and specification sheets on the admixtures to be used must accompany the mix design. Admixture. The admixtures available for concrete are numerous. While the discussion of each admixture is beyond the scope of this article, it is important to be aware of the general types of admixtures available. General categories for admixtures include ...

Concrete Trial mix design with difference cement (SLUMP ...

30/05/2019  Concrete Trial mix design: CHECKING THE SLUMP TEST, AIR CONTENT TEST AND WATER PROOF- this is videos part -1-SLUMP TEST - AIR CONTENT TEST- WATER PROOF TEST ...

7 Methods for Testing Concrete Strength For

11/06/2019  4. Pullout Test (ASTM C900) Method: The main principal behind this test is to pull the concrete using a metal rod that is cast-in-place or post-installed in the concrete

10 Things to Remember when doing Concrete Mix

Following are 10 Things to remember during Concrete Mix Design and Concrete Trials. 1. ACI and other standards only serves as a guide, initial designs must be confirmed by laboratory trial and plant trial, adjustments on the design shall be done during trial mixes. Initial design “on paper” is never the final design. 2. Always carry out ...

SECTION 03 30 00, CAST-IN-PLACE CONCRETE

Test Report for Concrete Mix Designs: Trial mixes including watercement // fly ash // ratio curves, concrete mix ingredients, and admixtures. Shoring and Reshoring Sequence: Submit for approval a shoring and reshoring sequence for flat slab/flat plate portions, prepared by a registered Professional Engineer. As a minimum, include timing of form stripping, reshoring, number of floors to be re ...

Concrete Mix Design - sginstitute

Concrete Mix Design ... The proportions are required to be adjusted for the field conditions. Fine Aggregate has surface moisture of 2 % Weight of F. A. = 803.0 + 2 100 803.0 = 819.06 kg m3 Course Aggregate absorbs 1% water Weight of F. A. = 992.0 − 1 100 992.0 = 982.0 kg m3. Step 10: Final Design Proportions Ingredients Cement Fine Aggregate Coarse Aggregate Water Chemical Quantity 𝑘 3 ...

Procedure for Rcc Concrete - Civiljungle

The trial mix shall be taken at the site condition for the design mix. C. Mixing of Concrete: For weight — batching in a plant, the entire ingredient shall be poured by weight. Cement shall be stored in cement through bucket – elevator. Water shall be measured in volume. The admixture shall be measured by weight. During hot/cold weather, the mixing shall be as per IS:7861. Also Read : Part ...