Cement and sandy soil mortar prepared from engineering muck instead of natural sands, and preparation method and application thereof

The invention discloses a cement and sandy soil mortar prepared from engineering muck instead of natural sands, and a preparation method and an application thereof. The preparation method comprises the following steps: drying and grinding waste engineering muck taken from the construction site, sieving and mixing the dried and ground waste engineering muck to form reclaimed engineering muck, and adding the reclaimed engineering muck and natural sands into a mortar stirrer according to a certain ratio in order to form a sand mixture; pouring water and cement into the mortar stirrer, adding a part of the sand mixture and a part of a water reducing agent, and performing uniform stirring; and adding the remaining sand mixture and the remaining water reducing agent, and performing uniform stirring to prepare the cement and sandy soil mortar prepared from engineering muck instead of natural sands. The preparation method provided by the invention has the advantages of realization of full utilization of a large amoun