Many do mould blocks onsite using masons and labour to do the job and claims is cheaper but I don’t think so when you consider the advantages the engine moulded has over hand-moulded.
(1)Engine moulded blocks compacts better because greater pressure is applied through the engine , the sand are better compacted and gives better products to the hand-moulded.
(2)The engine- moulded blocks are faster to produce, therefore a deal of time is saved which helps in reducing the general project construction time.
(3)The engine- moulded is also finished with a smoother surface which helps the bricklayer during laying and gives the building a nice look.
(4)The engine moulded blocks process helps to reduce theft, imagine you having a limited time to monitor the forming of the blocks with engine, what would have taken one month to do will be done in three days or less depending on the capacity of the engine. You can take less time to monitor the materials used like cement, quantities of sand bought, and you can monitor the mix ratio/quality unlike the hand- moulded that will delay and create room for the labourers to steal the materials.
(5)Is easier to monitor the forming process as well
(6)The engine- moulded types with same mixture ratio will be stronger due to better compacting and the difference in material used will still be negligible.
(7)The engine moulded blocks has better look which is attractive and will enhance the aesthetic of the building even during construction.
(8)The engine moulded blocks due to its smooth and straight surface errors are reduced to a minimum which also helps the bricklayer to get a better job done.