ACI
2017-03-08 06:28:11 0 举报ACI，全称美国认证协会（American Certification Institute），是全球最大的专业资格授予机构之一。成立于1924年，总部位于美国弗吉尼亚州。ACI提供超过300种专业认证，涵盖人力资源、信息技术、健康护理、环境服务等多个领域。ACI的认证标准均基于全球行业最佳实践和专业知识，被全球120多个国家和地区广泛接受和认可。通过ACI的认证，专业人士能够提升自身的专业技能和知识，提高就业竞争力，同时也为企业提供了评估和选拔人才的重要依据。
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Prepreation
Design and Control of Concrete Mixtures
Calculate Air Content
to reduce segregation
kg (per unit of concrete)
NAIT Mix Design Handout
from Table 12-7: query for the min required cement (pay attention to the note)
Tool: Processon; Date: March 2017
water reducer agent agent (kg reduced to ml)
air entrainment agent (kg)
or
from Table 12-1: query for recommended air content category
Compare and Select the Greater
Estimate Admixture Content
calculate the required cement based on w/c ratio and the water content (after reduction adjustment)
max allowable air content for batch design
Use Standard Deviation to calculate f'cr
Air Entrained
Cast Strength Cylinders Speciment
air entrainment agent (kg reduced to ml)
12-6 Recommended Slumps for Various Type of Construction
Table 12-3 Relations Between Water to Cementing Materials Ratio and Compressive Strength of Concrete
Butter the Mixer
Choose Requried Compression Strength (f'cr)
ACI 211
Estimate Coarse Aggregate Content
%
Table 12-7 Minimum Requirement of Cementing Materials for Concrete Use in Flatwork
water (kg) refer to the value from the previous step
Add 1／2 of Initial Water to the Mixer
Determine Air Content
Proportioning
cement (kg)
f'c: specified comp. strength
Select Water Cement Ratio
kg (per unit of required concrete)
Run the Mixer
from Table 12-3: calculate max w/cbased on f'cr
When With Statistics Data:
Batching
Trial Mix
Perform Slump Test
Estimate Fine Aggregate Content
Portland Cement ConcreteMix Design ACI Method
Mix the Batch
input the dry bulk rodded density of CA
ACI 211.1
When No Statistics Data:
physical dimensions of concrete element
Sumarize Batch Amount
Fresh Concrete Testing
FA wet (kg)
Table 11-1 CSA A23.1-09 Exposure Classes
Table 12-4 Bulk Volume of Coarse Aggregate Per Unit Volume of Concrete
Compare and Select the Lower
all quantities other than FA are known
Until all ingredients are added
Add all of the air entraining agent to the initial water
Add All Coarse Aggregate
air content volume is calculated by percentage
Density Testing
Choose Maximum Aggregate Size
Use Table 12-11 to calculate f'cr
More Trial Bathes Test
Non Air Entrained
subtract the sum of 1 cub meters
Test Fresh Concrete
decimal #
purpose and environmental setting
requirement from table 12-1
Determine Density
Table 12-5 Approximate Water and Air Content Required for Different Slumps and Nominal Maximum Sizes of Aggregate
from Table 12-1: query for the max w/c ratio based on exposure class
the initial water will be added to mixer
Sample the Aggregate for Moisture Condition
Table 12-11 Required Average Compressive Strength f'cr
Compressive Strength Test
Add 1/4 of Cement
Slum Selection
Adjust for Aggregate Moisture
Calculate Cement Content
CSA A23.2-2C
water (kg)
Calculate Concrete Density
mix for a few revolutions
Calculate Water Content
CA wet (kg)
Compiled by Yun peng Qin
water reducer agent (kg)
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