A novel approach to improve quality of delivered concrete using slump estimations of the ready-mixed concrete (RMC) truck mixer

2021 ◽  
pp. 103361
Author(s):  
Mohammad Malekipour ◽  
Faramarz Moodi
Keyword(s):  
Improve Quality ◽  
Novel Approach ◽  
Ready Mixed Concrete ◽  
Mixed Concrete

A reflective evaluation of the Bradford positive behaviour support – in reach service

2020 ◽  
Vol 25 (4) ◽  
pp. 185-192
Author(s):  
Matthew Hodder ◽  
Tom Syson ◽  
Zobia Aziz ◽  
Anthony Handy ◽  
Hafsa Khan ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Young People ◽  
Third Sector ◽  
Service Evaluation ◽  
Improve Quality ◽  
Content Type ◽  
Novel Approach ◽  
Adolescent Mental Health Service ◽  
Positive Behaviour Support

Purpose Without effective support and intervention, young people with learning disabilities and severe challenging behaviour are at risk of placement in out-of-area residential settings or highly specialist child and adolescent mental health service (CAMHS) units. Such placements may be inappropriate and result in significant reductions to the quality of life of young people and their families. This paper aims to evaluate the effectiveness of the Bradford positive behaviour support (PBS) service model in terms of its aims to improve quality of life, develop skills and maintain children living with their families in their own homes. Design/methodology/approach A service evaluation using quantitative and qualitative data from a range of sources to review the effectiveness of the PBS model being applied in Bradford and Calderdale was the methodology used. Findings When consistently implemented, the Bradford positive behaviour support–in reach service may improve quality of life, facilitate skill development in young people and their carers and reduce placements in residential and CAMHS inpatient units. Avoidance of such placements is likely to reduce the overall costs of service commissioning in Bradford. Originality/value This paper evaluates a novel approach being applied by a third sector agency to implement effective PBS with a small group of children, their families and networks. There is scope for this model to be successfully implemented in other areas.

Study on Application of Artificial Sand in Ready-Mixed Concrete

2013 ◽  
Vol 800 ◽  
pp. 40-43
Author(s):  
Jian Mei Zhou
Keyword(s):  
Fresh Concrete ◽  
Clay Content ◽  
Poor Quality ◽  
Fine Aggregate ◽  
Natural Sand ◽  
The Poor ◽  
Concrete Property ◽  
Ready Mixed Concrete ◽  
Mixed Concrete

Artificial sand can be obtained by mixing washed sand formed from the the poor quality of natural sand with high clay content and stone powder formed from processing and screening production by appropriate ratio, Which be applied to C20~C35 ready-mixed concrete. By studying the effect the artificial sand on the properties of fresh concrete and concrete after hardening, the result showed that artificial sand substitute for natural sand as ready-mixed concrete fine aggregate is entirely feasible. Key words: Artificial sand, Ready-mixed concrete, Property

scholarly journals Interlaboratory Comparative Tests in Ready-Mixed Concrete Quality Assessment

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3475
Author(s):  
Izabela Skrzypczak ◽  
Agnieszka Leśniak ◽  
Piotr Ochab ◽  
Monika Górka ◽  
Wanda Kokoszka ◽  
...  
Keyword(s):  
Quality Assessment ◽  
Statistical Methods ◽  
Test Methods ◽  
Hardened Concrete ◽  
Proficiency Tests ◽  
Test Results ◽  
Concrete Mix ◽  
Ready Mixed Concrete ◽  
Mixed Concrete

Proper quality assessment of ready-mixed concrete, which is currently the principal material for construction, land engineering and architecture, has an impact on the optimisation and verification of correct functioning of individual stages of the production process. According to the European Standard EN 206 “Concrete–Specification, performance, production and conformity”, obligatory conformity control of concrete is carried out by the producer during its production. In order to verify the quality of concrete, investors generally commission independent laboratory units to perform quality assessment of both concrete mix and hardened concrete, which guarantees a high quality of construction works. One of the essential tools for ensuring the quality of test results is the participation of laboratories in the so-called proficiency testing (PT) or inter-laboratory comparisons (ILC). Participation in PT/ILC programmes is, on the one hand, a tool for demonstrating the laboratory’s performance, on the other hand an aid for maintaining the quality of available concrete tests and validating test methods. Positive evaluation is a confirmation of the laboratory’s capability for performing the tests. The paper presents the results of laboratory proficiency tests carried out by means of inter-laboratory comparisons, as shown in the example of quality assessment of ready-mixed concrete for nine participating laboratories. The tests were performed for concrete of the following parameters: strength class C30/37, consistency S3, frost resistance degree F150, and water resistance degree W8. This involved determining consistencies, air content and density of the concrete mix, and compressive strength of hardened concrete. For the evaluation of laboratory performance results, z-score, ζ-score and En-score were applied. The innovation of the proposed study lies in employing both classical and iterative robust statistical methods. In comparison with classical statistical methods, robust methods ensure a smaller impact of outliers and other anomalies on the measurement results. Following the analyses, clear differences were found between the types of detected discrepancy of test results, which occurred due to the nature of individual parameters. For two laboratories, two scores revealed unsatisfactory results for concrete mix consistency. The main reasons can be pouring into the cone-shaped form a concrete mixture that is too dry, or incorrect use of a measuring tool also creating a possibility that the obtained value can be wrongly recorded. Other possible reasons are discussed in the paper. Participation in inter-laboratory comparison programmes is undoubtedly a way to verify and raise the quality of tests performed for concrete mix and hardened concrete, whereas individual analysis of the results allows the laboratory quality system to be improved.

scholarly journals Irradiation as a novel approach to improve quality of Tropaeolum majus L. flowers: Benefits in phenolic profiles and antioxidant activity

2015 ◽  
Vol 30 ◽  
pp. 138-144 ◽  
Author(s):  
Amanda Koike ◽  
João C.M. Barreira ◽  
Lillian Barros ◽  
Celestino Santos-Buelga ◽  
Anna L.C.H. Villavicencio ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Improve Quality ◽  
Novel Approach ◽  
Phenolic Profiles ◽  
Tropaeolum Majus
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