ST-45 PUMP — GENERAL INFORMATION

Regional Differences

Concrete is made by mixing locally available rock and sand with cement and water.For this reason there are great differences in the pumpability of concrete from one region of the country to another.

It is impossible to define a specific mix for each region that the Model ST-45 be will working in.Therefore, the mixes on pages 58-59 will provide a basic guideline for establishing the proper mix design for your area.

Use this information to specify your requirements to your local ready-mix batch plant, contractor and civil engineer.It may take minor adjustments to make a mix pumpable, so you should explain your needs.

The elements that have to be controlled and consistently maintained by the batch plant are:

1.The sizing and mix percentage of rocks, gap graded from the largest down through the smallest sizes.

2.Sand with a sieve analysis that has the proper percentage of fines, ASTM C33 spec.

3.Sufficient cement to produce the required design strength of the concrete and provide the lubricating binder to pump the concrete through the delivery system.

Use a minimum of:

5.The proper amount of water to make a workable slump and plasticize the mix.

In addition, the Mayco Structural Concrete ST-45 Pump can be used to pump a large aggregate hard rock as follows:

1.Pea rock (1/2" minus) pump with mixes being as low as 30% rock and 70% sand. (See page 44, for comments on cleaning the pump.)

2.Shortening pea rock when used with an air compressor and nozzle. (See back pages for recommended set-up.)

3.“Mud Jacking”, high pressure grouting.

500 lbs. of cement/cu yd for 2500 p.s.i. concrete after 28 days.

530 lbs. of cement/cu yd for 3000 p.s.i. concrete after 28 days.

600 lbs. of cement/cu yd for 4000 p.s.i. concrete after 28 days.

4. Admixture pump-aid if necessary.

PAGE 18 — MAYCO ST-45HRM PUMP — OPERATION & PARTS MANUAL — REV. #4 (07/16/04)

Page 17 Page 19
Page 18
Image 18
Multiquip ST-45HRM manual ST-45 Pump General Information, Regional Differences
Page 17 Page 19

ST-45HRM specifications

The Multiquip ST-45HRM is a highly versatile and robust soil compactor designed for various construction applications. With its advanced engineering and innovative technologies, it sets a new standard in the compaction equipment market. This model is particularly favored for its reliability, durability, and exceptional performance in both small-scale and large-scale projects.

One of the standout features of the ST-45HRM is its powerful engine. Equipped with a high-performance, fuel-efficient diesel engine, it delivers ample power while ensuring reduced fuel consumption. This results in not only lower operational costs but also decreased environmental impact, aligning with today's sustainability goals.

The compactor's dual-directional capability allows for efficient operation in compacting various soil types. Whether tackling granular, cohesive, or mixed soils, the ST-45HRM adapts seamlessly, ensuring optimal performance. Furthermore, it features a unique vibratory system that maximizes compaction efficiency, enabling faster job completion and minimizing the number of passes required.

Operator comfort and safety are paramount in the design of the ST-45HRM. The machine is equipped with an ergonomic operating platform and intuitive controls, allowing for easy maneuverability even in tight spaces. The advanced vibration dampening technology significantly reduces operator fatigue, making long hours of operation more manageable.

Additionally, the ST-45HRM offers impressive maneuverability, thanks to its compact size and precise control. This is particularly beneficial for working in confined areas, such as urban construction sites where space is limited. Its robust construction ensures it can withstand the rigors of challenging job sites while maintaining performance.

Maintenance is made simple with the ST-45HRM. The design allows for easy access to key components, reducing downtime and enhancing productivity. Regular service intervals and the use of quality materials ensure the longevity of the machine, making it a smart investment for contractors looking for reliable and efficient compaction equipment.

In summary, the Multiquip ST-45HRM combines powerful performance, innovative technology, comfort, and ease of maintenance into a single, versatile package. It is an ideal choice for contractors seeking a dependable soil compactor to meet the demands of various construction projects. With its impressive features and capabilities, the ST-45HRM stands out as a leader in the field of soil compaction.
Top Page Image Contents