ILsen Concrete

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Concrete design information.

21/08/2023

Tolerance In Aggregates and other Materials- Ready-Mixed Concrete.

ASTM C94 Chapter 9 Measuring Materials
9.1 Cementitious material- When the quantity of cementitious materials exceeds 30 % of the full capacity scale, the measured quantity of the hydraulic cement shall be within ±1 % of the required mass, and the cumulative measured quantity of hydraulic cement plus supplementary cementitious materials shall also be within ±1 % of the required cumulative mass at each intermediate weighing.
9.2.1 For aggregates are measured in individual or cumulative weigh batches, when the required intermediate or final mass is less than 30 % of the scale capacity the mass of the aggregate shall be within ± 0.3 % of the scale capacity or within ±3 % of the required mass, whichever is less.
9.2.2 When the aggregates are measured in an individual weigh batcher and the required mass of aggregate is equal to or greater than 30 % of the scale capacity, the quantity of aggregates shall be within ± 2 % of the required mass. When aggregates are measured in a cumulative aggregate weigh batcher, and the required intermediate and final cumulative mass of aggregate components is equal to or greater than 30 % of the scale capacity, the quantity of the aggregate at each successive weighing shall be within ± 1 % of the required mass.
Note 11- The batching accuracy limit of 0.3 % of scale capacity establishes a reasonable minimum weighing tolerance limit that is independent of the quantity of material being weighed. It generally governs for smaller batch quantities weighed in weigh batchers (scale).
9.3 Mixing water shall consist of water added to the batch, ice added to the batch, water occurring as surface moisture on the aggregates, and water introduced in the form of admixtures. The added water shall be measured by weight or volume to an accuracy of 1 % of the required total mixing water. Added ice shall be measured by weight. In the case of trucks mixers, any wash water retained in the drum for use in the next batch of concrete shall be accurately measured; if this proves impractical or impossible, the wash water shall be discharged prior to loading the next batch of concrete. Total water (including any wash water) shall be measured or weighed to an accuracy of ± 3 % of the specified total amount.
Required accuracy of the batched water is a relatively tight ± 1 % of the total mixing water. Water meter calibrations are typically to a tolerance of ± 1 % of the actual batch water quantity going through the meter.
The NRMCA National Ready Mix Concrete Association Certification program includes a requirement that volumetric measuring devices for water at the plant be accurate ± 1.5 % of the target water quantity.
Admixture: most chemical admixtures contain approximately 70 % water and 30 % solids.
9.4 Chemical admixtures in powdered form shall be measured by mass. Liquid chemical admixtures shall be batched by mass or volume. Admixtures measured by either mass or volume, shall be batched with an accuracy of ± 3 % of the total amount required or plus or minus the amount or dosage required for 100 lb [50 kg] of hydraulic cement, whichever is greater.

21/08/2023

Compressive Strength Results @ 28 Days Job Mix 1 : 2 : 3 & 2500 Psi Pcd

The objective of this comparative is to know the ultimate strength of job mix 1:2:3. As we can see the cement factor of job mix 1:2:3 in one cubic meter is 400 kilograms while the 2500 Psi is 352 kilograms. Another thing the job mix 1:2:3 doesn't use while the 2500 Psi used a minimum dosage of admixture 0.0075 by cement. This comparison of job mix 1:2:3 and 2500 Pump mix is really challenging in construction.

21/08/2023

NSCRP - North-South Commuter Railway Project, 50 Mpa Concrete Design (Precast Segment)

21/08/2023

NSCRP Project- Lunching Girder Set-up Front Support Legs

21/08/2023

Concrete Field Testing Technician - 1, ASTM C 172 - 14a - Reviewer

21/08/2023

NSCRP - Metro Railway Project - Er****on of Precast Segment Using Launching Girder

21/08/2023

Statistical Analysis of Concrete Strength (Shewhart Chart)
Statistical Process Control (SPC)

21/08/2023
20/08/2023

50Mpa Precast Segment

Photos from ILsen Concrete's post 21/05/2023

My latest Design Format Combined ACI & DIN

Note: Maximum 5 different Aggregates into single grading.

13/05/2023

Thank you Boss G👏

20/02/2022

GRJ JARO READY MIX CORP.
II Poured 375 m3 @ New Ville Project,
II 3000 Psi G-1 @ 28 Days

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https://youtu.be/YY5Cspm37QQ

20/02/2022

50Mpa with Fly Ash -Metro Rail Project Philippines -Pampangga to Bulacan-Courtesy by Ronnyl Catubig

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https://youtu.be/sfwG9L4zOrE

19/01/2022

What is the purpose of this testing?

17/01/2022

How to Make a Concrete design mixture guided with technical knowledge ( Tagalog version)

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https://youtu.be/X_IztBjpxAo

17/01/2022

How To Make Concrete Price Sample Computation.

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17/01/2022

Slab Structure, 4000 Psi Concrete Design Mixture poured by Skelton Concrete Products (2010) Limited

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https://youtu.be/5mFz0_I1pwg

Concrete Design Mixture (196 cubic yard poured by SCP)

17/01/2022

TBM Tunnel Boring Machine Riyadh Metro Project

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17/01/2022

Skelton Concrete Products (2010) Limited Pouring at Windy Hill

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https://youtu.be/06fnj_d9wfc

17/01/2022

Skelton Concrete Products (2010) Limited - Slab Structure

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https://youtu.be/nCRGdVabkp0

Design Mixture: 3500 Psi Pump Mix
Quantity: 82 Cubic Yards
Location: Cooten Bay
Type of equipment used: Pumpcrete (Boom Type) 38 meters

17/01/2022

Watch the Quality of Skelton Concrete Products (2010)Limited - Shed Slab
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https://youtu.be/fN0jQE17OOA

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Videos (show all)

Tolerance In Aggregates and other Materials- Ready-Mixed Concrete.ASTM C94 Chapter 9 Measuring Materials9.1 Cementitious...
Compressive Strength Results @ 28 Days Job Mix 1 : 2 : 3 & 2500 Psi PcdThe objective of this comparative is to know the ...
NSCRP - North-South Commuter Railway Project, 50 Mpa Concrete Design (Precast Segment)
NSCRP Project- Lunching Girder Set-up Front Support Legs
Concrete Field Testing Technician - 1, ASTM C 172 - 14a - Reviewer
NSCRP - Metro Railway Project - Erection of Precast Segment Using Launching Girder
50Mpa Precast Segment
https://youtu.be/4jEnOVYHLuUNSCR - Metro Railway Project - Erection of Precast Segment Using Launching Girder
GRJ JARO READY MIX CORP. II  Poured 375 m3 @ New Ville Project, II 3000 Psi G-1 @ 28 DaysLike, Share, and Subscribe. Tha...
50Mpa with Fly Ash -Metro Rail Project Philippines -Pampangga to Bulacan-Courtesy by Ronnyl CatubigLike, Share, and Subs...
How to  Make a Concrete design mixture guided with technical knowledge ( Tagalog version)Like & Share my Video. Thanks👍👍...

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