China
Africa
Explore chapters and articles related to this topic
Preparing and Mixing Concrete and Mortar
Published in Malcolm Thorpe, Brickwork Level 1, 2021
Methods of transport range from hand wheelbarrows to concrete pumps (Figure 6.34).Barrow – The most common method on small building sites is the wheelbarrow.Dumper – There are many sizes and designs of dumper, which can be used for transporting concrete from mixers up to 600 litre capacity.Ready-mixed concrete lorry – When ready-mixed concrete is prescribed, large amounts can be delivered either ready mixed or site mixed to most site positions.Pumps – Concrete pumps are used to transport large volumes of concrete (up to 100 m3) in a short period, in both vertical and horizontal directions.Cranes – These are available in many makes and sizes according to the job in hand. Cranage can be either mobile or fixed. Cranes can span the whole building area so are excellent for the placing of concrete on large multistorey buildings. There are also several types of machine available to move concrete around construction sites, such as front loaders.
Construction of tunnels for various purposes
Published in Ya. I. Marennyi, R.B. Zeidler, Tunnels with In-Situ Pressed Concrete Lining, 2020
A tunnel concrete pump by ‘Putzmeister’ delivered mix into the adit to the height of 340 m during the construction of the Saint-Gotthard tunnel. The company provides concrete pumps mounted on trucks, with articulated booms for concrete delivery or placement (Fig. 4.29a). The specific feature of the tunneling version is that the pivot is positioned in the middle of the articulated boom trunk.
Plant
Published in Roy Chudley, Roger Greeno, Karl Kovac, Chudley and Greeno’s Building Construction Handbook, 2020
Roy Chudley, Roger Greeno, Karl Kovac
These are used to transport large volumes of concrete in a short time period (up to 100m3 per hour), in both the vertical and horizontal directions, from the pump position to the point of placing. Concrete pumps can be trailer or lorry mounted and are usually of a twin cylinder, hydraulically driven format with a small bore pipeline (100mm diameter). The pump is supplied with pumpable concrete by means of a constant flow of ready mixed concrete lorries throughout the pumping period, after which the pipeline is cleared and cleaned. Usually a concrete pump and its operator(s) are hired for the period required.
Modelling and calibration of a five link elastic boom of a mobile concrete pump
Published in Mathematical and Computer Modelling of Dynamical Systems, 2023
M. Meiringer, A. Kugi, W. Kemmetmüller
In recent years, the building industry is facing an increasing demand concerning the reduction of construction times and costs. As a consequence, manufacturers of building machines aim at making their products more efficient. As an example, mobile concrete pumps, which are used to deliver concrete from the cement mixer to the formwork, have reached a working area of up to 80 m and the boom comprises up to 8 individual joints. Since the carrier truck is limited in length and maximum load, the boom is constructed in the form of very lightweight elastic arm segments connected via complex joint mechanisms1. The large number of joints and the high flexibility of the boom makes the manual control of these machines by human operators a challenging task. Thus, there is an increasing demand for semi-autonomous assistance systems, which help the operator to achieve the best performance of these building machines.