Comments

If the Ministry is looking to alienate more readymix suppliers, I believe the penalties embedded within the SP will do just that. We already have difficulty finding a readymix supplier willing to take on the risk and the onerous administrative needs that the MTO demands. Read more

Changes to the referee testing for RCP results will likely result in more rejections due to the shortened time frame and the larger difference from acceptance result. Read more

For clause 1350.04.02.01.04, point c: This requirement is redundant with the documentation required to be listed on the CASL. These materials already would have demonstrated compliance with the requirements of OPSS 1002. Read more

1350.04.01.01.01 General Read more

I represent a concrete producer in the Ontario construction industry and would like to raise the following points of consideration with the Ministry related to the proposed changes highlighted in the draft Special Provision No. DBSP1350: Read more

I represent a concrete producer in the Ontario construction industry and would like to raise the following points of consideration with the Ministry related to the proposed changes highlighted in the draft Special Provision No. DBSP1350: Read more

1350.03 – Definitions

Since this standard has now deleted the definition of “High Strength Concrete”, does the definition included in CSA A23.1/.2 – 2024 now apply as per below?

 

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1350.04.01.01.01 – General 

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1350.05.04.01 – General
The requirements outlined in this section regarding GWP reduction and environmental reporting raise several concerns for the ready-mixed concrete industry, as summarized below:

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Ground granulated blast furnace slag or fly ash or a combination of the two materials and shall be restricted to the following proportions by mass of the total cementing material:
a) Slag up to 25%.

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1350.05.04.02 – Plastic Concrete Requirements

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1350.06.02 – Delivery Equipment
The prohibition on the use of mobile mixers raises the following concerns:

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1350.07.04.02 – Discharge Time
The specified discharge time limits raise the following concerns:

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Clause 1350.07.04.02 Discharge Time When concrete or OGDL is transported by means of non-agitating equipment, discharge shall be completed within 30 minutes after introduction of the mixing water to the cement and aggregates. Read more

1350.08.01.01 General

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1350.05.04.02 Plastic Concrete Requirements

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Table 5DB
Penalty for 28-Day Compressive Strength

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Table 6 DB
Penalty for Air Void System Parameters of Hardened Concrete for Concrete Other Than Silica Fume Overlays and HPC

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Table 7 DB, Table 8DB and Table 9 DB

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Sorry for the delay, I hope my comments are considered. We have been working for MTO projects for many years, and we usually encounter additional challenges in MTO projects for the following reasons (some of them have been discussed already and there are plans address them) Read more