Novel light mortar and preparation method thereof

Abstract

The invention discloses novel light mortar and a preparation method thereof. The novel light mortar is prepared from the following raw materials in parts by weight: 16-25 parts of Portland cement, 15-30 parts of modified glass beads, 40-60 parts of aggregate prepared from 18-80-mesh construction waste, 9-20 parts of filler prepared from construction waste of more than 80 meshes, 0.5-4 parts of redispersible latex powder, 0.1-0.3 part of cellulose ether with the viscosity of 100,000 and 0-0.3 part of modified polyoxyethylene. And 0-0.2 part of polypropylene fiber. The light mortar is prepared by mixing high-ratio construction waste, and the prepared mortar is high in comprehensive performance and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and specifically to a novel lightweight mortar and a preparation method thereof. Background Art

[0002] Waste concrete blocks, waste bricks, mortar, and slag in construction waste are used as a source of recycled aggregate or filler after being crushed, screened, and ground into powder. With the acceleration of urbanization, the demand and requirements for mortar in construction projects are getting higher and higher.

[0003] Therefore, the present invention develops a lightweight mortar made from high-mixing ratio construction waste, which has high comprehensive performance and low cost. Summary of the Invention

[0004] The present invention provides a novel lightweight mortar and a preparation method thereof. A high proportion of construction waste base material is added to form a batch material, and a dispersant and a filler are added and mixed.

[0005] To achieve the above-mentioned purpose, one of the technical solutions adopted by the present invention is to provide a new lightweight mortar, which is made from the following raw materials in parts by weight: 16-25 parts of silicate cement, 15-30 parts of modified vitrified microspheres, 40-60 parts of aggregate made from 18-80 mesh construction waste, 9-20 parts of filler made from construction waste above 80 mesh, 0.5-4 parts of redispersible latex powder, 0.1-0.3 parts of 100,000 viscosity cellulose ether, 0-0.3 parts of modified polyethylene oxide, and 0-0.2 parts of polypropylene fiber.

[0006] Furthermore, the modified vitrified microspheres have a particle size of 30-70 meshes and a bulk density of 150-220 kilograms per cubic meter.

[0007] In addition to the modified vitrified microspheres added to the above base material, the inorganic waste collected from construction sites is obtained through drying, crushing and screening.

[0008] A second aspect of the present invention further provides a method for preparing a novel lightweight mortar, comprising the following steps:

[0009] Step 1: Screening inorganic waste from construction site waste and then soaking it in strong acid;

[0010] Step 2: Drying after cleaning;

[0011] Step 3: The treated inorganic waste is crushed multiple times and sieved to obtain aggregates of 18-80 mesh and fillers of 80 mesh and above;

[0012] Step 4, drying the 18-80 mesh aggregate for later use;

[0013] Step 5, drying the filler made from construction waste with a mesh size of 80 or larger for later use;

[0014] Step 6, weigh the following raw materials in parts by weight: 16-25 parts of silicate cement, 15-30 parts of modified vitrified microspheres, 40-60 parts of aggregate made from 18-80 mesh construction waste, 9-20 parts of filler made from construction waste above 80 mesh, 0.5-4 parts of redispersible latex powder, 0.1-0.3 parts of 100,000 viscosity cellulose ether, 0-0.3 parts of modified polyethylene oxide, and 0-0.2 parts of polypropylene fiber.

[0015] The beneficial effects of the present invention are as follows: the novel lightweight mortar of the present invention has good water retention and moderate viscosity, and the water can be evenly diffused after water is added on site. DETAILED DESCRIPTION

[0016] To make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments.

[0017] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0018] Example 1

[0019] A method for preparing a novel lightweight mortar comprises the following steps:

[0020] Step 1: Screening inorganic waste from construction site waste and then soaking it in strong acid;

[0021] Step 2: Drying after cleaning;

[0022] Step 3: The treated inorganic waste is crushed multiple times and sieved to obtain mixed aggregates of 18-80 mesh and mixed fillers of 80 mesh and above;

[0023] Step 4, drying the 18-80 mesh aggregate for later use;

[0024] Step 5, drying the filler made from construction waste with a mesh size of 80 or larger for later use;

[0025] Step 6, weigh the following raw materials in parts by weight: 16 parts of Portland cement, 15 parts of modified vitrified microspheres, 40 parts of aggregate made from 18-80 mesh construction waste, 9 parts of filler made from construction waste above 80 mesh, 0.5 parts of redispersible latex powder, 0.1 parts of 100,000 mPa.s cellulose ether, and 0.1 parts of modified polyethylene oxide.

[0026] Example 2

[0027] The method is roughly the same as Example 1, except that the weight parts of the raw materials weighed are different: 20 parts of Portland cement, 20 parts of modified vitrified microspheres, 50 parts of aggregate made from 18-80 mesh construction waste, 15 parts of filler made from construction waste above 80 mesh, 2 parts of redispersible latex powder, 0.2 parts of 100,000 mPa.s cellulose ether, 0.1 parts of modified polyethylene oxide, and 0.1 parts of polypropylene fiber.

[0028] Example 3

[0029] The method is roughly the same as Example 1, except that the weight parts of the raw materials weighed are different: 25 parts of Portland cement, 30 parts of modified vitrified microspheres, 60 parts of aggregate made from 18-80 mesh construction waste, 20 parts of filler made from construction waste above 80 mesh, 4 parts of redispersible latex powder, 0.3 parts of 100,000 mPa.s cellulose ether, 0.3 parts of modified polyethylene oxide, and 0.2 parts of polypropylene fiber.

[0030] Comparative Preparation Example 1

[0031] Step 1: Screen and clean the inorganic waste from the construction site waste, dry it, and crush it multiple times to obtain 15-mesh mixed aggregate and 80-mesh mixed filler for later use;

[0032] Step 2, drying the 15-mesh aggregate for later use;

[0033] Step 3, drying the filler made from construction waste with a mesh size of 80 or larger for later use;

[0034] Step 4, weigh the following raw materials in parts by weight: 16 parts of Portland cement, 15 parts of modified vitrified microspheres, 40 parts of aggregate made from 18-80 mesh construction waste, 9 parts of filler made from construction waste above 80 mesh, 0.5 parts of redispersible latex powder, 0.1 parts of 100,000 mPa.s cellulose ether, and 0.1 parts of modified polyethylene oxide.

[0035] Comparative Preparation Example 2

[0036] Step 1: Screening inorganic waste from construction site waste and then soaking it in strong acid;

[0037] Step 2: Drying after cleaning;

[0038] Step 3: The treated inorganic waste is crushed multiple times and sieved to obtain 10-mesh mixed aggregate and 80-mesh mixed filler. The filler made from construction waste with 80-mesh or larger is reserved.

[0039] Step 4, drying the 10-mesh aggregate for later use;

[0040] Step 5, weigh the following raw materials in parts by weight: 16 parts of Portland cement, 15 parts of modified vitrified microspheres, 40 parts of aggregate made from 18-80 mesh construction waste, 9 parts of filler made from construction waste above 80 mesh, 0.5 parts of redispersible latex powder, 0.1 parts of 100,000 mPa.s cellulose ether, and 0.1 parts of modified polyethylene oxide.

[0041] The dry density and compressive strength of the above examples and comparative preparation examples were tested, and the test results are as follows: the average dry density of Examples 1 to 3 is 600Kg / m 3 The compressive strength after 28 days can reach 3.2MPa, which can meet the requirements of lightweight dry-mixed mortar for construction engineering. The average dry density of the comparative preparation example 1 to the comparative preparation example 2 is 900Kg / m 3 The compressive strength after 28 days can reach about 2.8MPa. The types of mortar prepared by activating the aggregates and fillers made from construction waste are significantly improved. Recycled construction waste is added in a high proportion, and the aggregates and fillers are dried and then mixed with silicate cement and additives to prepare the mortar. The production method is simple and low in cost.

[0042] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A new type of lightweight mortar, characterized by , made of the following raw materials in parts by weight: made of the following raw materials in parts by weight: 16-25 parts of Portland cement, 15-30 parts of modified glass microspheres, 40-60 parts of aggregate made from 18-80 mesh construction waste, 9-20 parts of filler made from construction waste above 80 mesh, 0.5-4 parts of redispersible latex powder, 0.1-0.3 parts of 100,000 viscosity cellulose ether, 0-0.3 parts of modified polyethylene oxide, and 0-0.2 parts of polypropylene fiber.

2. The novel lightweight mortar according to claim 1, characterized in that The particle size of the modified vitrified microspheres is 30-70 mesh and the bulk density is 150-220 kilograms per cubic meter.

3. The method for preparing the novel lightweight mortar according to any one of claims 1-2, characterized in that , including the following steps: Step 1: Screening inorganic waste from construction site waste and then soaking it in strong acid; Step 2: Drying after cleaning; Step 3: The treated inorganic waste is crushed multiple times and sieved to obtain aggregates of 18-80 mesh and fillers of 80 mesh and above; Step 4, drying the 18-80 mesh aggregate for later use; Step 5, drying the filler made from construction waste with a mesh size of 80 or larger for later use; Step 6, weigh the following raw materials in parts by weight: 16-25 parts of silicate cement, 15-30 parts of modified vitrified microspheres, 40-60 parts of aggregate made from 18-80 mesh construction waste, 9-20 parts of filler made from construction waste above 80 mesh, 0.5-4 parts of redispersible latex powder, 0.1-0.3 parts of 100,000 viscosity cellulose ether, 0-0.3 parts of modified polyethylene oxide, and 0-0.2 parts of polypropylene fiber.