What is the construction mortar mix ratio, masonry mortar mix ratio?

Cement mortar is a mortar prepared by cement, fine aggregate and water, that is, cement + sand + water, according to needs, and cement mixed mortar is prepared from cement, fine aggregate, lime and water. The two are different concepts, with different names and different uses.

The commonly said 1:3 cement mortar is matched with 1 weight cement and 3 weight sand, in fact, the composition of water is ignored, generally in the left and right ratio, that is, it should become 1:3:, and the density of cement mortar is 2000kg m3.

Note: The mortar used in the construction process, in order to facilitate the construction, is generally mixed on site, and the cement mortar mix ratio of 1:3 refers to the weight ratio, and then converts it into a volume ratio according to the capacity of the on-site mixer or material container; The mortar used in structural construction is mostly finished mortar, and the strength of the mortar is mostly expressed by the strength of the mortar, such as M5, mortar, etc.

The exterior wall is plastered with cement mortar, and the mortar is generally prepared with a 1:3-weight ratio. If the interior wall is plastered with cement mortar, 1:1 is generally used

3. Weight ratio. The standard for going to Zhushan Township should be that cement mortar is not allowed to be used for mixed mortar and red brick masonry. The mix ratio should be determined according to the strength of the mortar, although there is no too strict requirement, but it is necessary to add white ash, which can increase the workability of the mortar and ensure the strength of the bond.

The strength of cement mortar marking refers to a value in the overall distribution of compressive strength measured by standard test methods for cubic specimens made and maintained according to standard methods at the age of 28 days.

No. 100 cement mortar means that its strength is 100kg cm2, but now it is all changed to MPA, and No. 100 corresponds to M10. The mix ratio is different according to the different raw materials and different uses of mortar, and there is no certain, taking the commonly used ordinary Portland cement, medium sand with 100 (m10) masonry mortar as an example: cement 305kg:

Sand: water 183kg.

The mortar is marked with M3, M5, M10, M15, M20, M25, M30, M40. Mortar is divided into masonry, plastering, and joints according to its use, and has nothing to do with the label.

The mortar is determined by measuring the compressive strength of a standard cubic specimen (a set of 6 pieces) under standard curing conditions for 28 days. According to the compressive strength of the mortar, the mortar is divided into 7 grades, such as M20, M15, M10 ,,,.

The following three strengths and coarse, medium and fine sand are commonly used in cement-lime mixed mortar:

Plastering the interior and exterior walls is mainly based on the requirements, the general strength of the exterior wall is higher, and the water consumption is adjusted according to the workability of the mortar.

mortar strength m5; Cement strength grade, coarse sand.

Weight mix ratio = , amount per cubic = cement 212kg lime paste 118kg sand 1510kg

mortar strength m5; Cement strength grade, medium sand.

Weight mix ratio = , amount per cubic = cement 221kg lime paste 124kg sand 1450kg

mortar strength m5; Cement strength grade, fine sand.

Weight mix ratio = , amount per cubic meter = cement 229kg lime paste 131kg sand 1390kg

mortar strength; Cement strength grade, coarse sand.

Weight mix ratio = , amount per cubic = cement 242kg lime paste 88kg sand 1510kg

mortar strength; Cement strength grade, medium sand.

Weight mix ratio = , amount per cubic = cement 251kg lime paste 94kg sand 1450kg

mortar strength; Cement strength grade, fine sand.

Weight mix ratio = , amount per cubic = cement 261kg lime plaster 99kg sand 1390kg

mortar strength m10; Cement strength grade, coarse sand.

Weight mix ratio = , amount per cubic = cement 271kg, lime paste 59kg, sand 1510kg

mortar strength m10; Cement strength grade, coarse sand.

Weight mix ratio = , amount per cubic = cement 282kg, lime plaster 63kg, sand 145kg

mortar strength m10; Cement strength grade, coarse sand.

Weight mix ratio = , amount per cubic = cement 293kg, lime paste 67kg, sand 1390kg

The mix ratio of cement masonry mortar is generally M20cement mortarMix ratio,SandThe mud content is 5%, and the volume ratio is 1:2:5 per cubic meter = cement + sand = 457 + 1742 weight ratio = cement + sand = 1 + river sandMoisture content5 to 10 percent can be used in this ratio, that is, more water can be added but not more than 5 to 10 percent.

Masonry mortar refers to the mortar of bricks, stones, blocks and other blocks that are stuffed into masonry through masonry. It plays the role of bonding, liner and force transfer, and is an important part of masonry. Cement mortar is suitable for masonry in humid environments and masonry with high strength requirements.

Cement-lime mortar should be used for masonry in a dry environment; The walls of multi-storey houses are generally made of cement-lime mortar with a strong punching bending grade of M5; Brick columns, brick arches, reinforced brick lintels, etc. generally use cement mortar with a strength grade of m5 m10; The brick foundation is generally made of cement mortar not less than m5; Leakage low-rise houses or bungalows can use lime mortar; Simple houses can be made of lime clay mortar.

The cement masonry mortar mix ratio is generally M20 cement mortar mix ratio and 5% of the sand mud contentVolume ratio 1:2:5 per cubic meter = cement + sand = 457 + 1742 weight ratio = cement + sand = 1 + moisture content of river sand, 5 to 10 percent can be used such a ratio, that is, more water chain eggplant bush can be added but not more than 5 to 10 percent.

Composition: Cement:

Cement is the main cementitious material of mortar, and the commonly used cement varieties are ordinary cement, slag cement, pozzolane cement, fly ash cement and composite cement, etc., and the suitable cement varieties can be selected according to the design requirements, masonry parts and environmental conditions. The choice of low-strength cement can meet the requirements. The strength grade of the cement used in cement mortar should not be greater than the grade; The strength grade of the cement used in the cement mixed mortar should not be greater than the grade.

If the cement strength grade is too high, you can add some mixed materials. For some special purposes, such as the joints and joints of the configuration member shed, or for structural reinforcement and repair of cracks, expanded cement should be used.

Cementitious materials: The cementitious materials used for masonry mortar are cement and lime.

The choice of cement varieties is the same as for concrete. Cement grade should be 4-5 times the strength grade of mortar, cement grade is too high, will make cement insufficient and lead to poor water retention. Lime paste and hydrated lime are not only used as cementitious materials, but more importantly, to make the mortar have good water retention.

Fine aggregates: Fine aggregates are mainly natural sand, and the mortar prepared by the inclusion is called ordinary mortar. The clay content in the sand should not be more than 5%; When the strength grade is less than, the clay content should not be more than 10%.

The maximum particle size of sand should be less than 1 4-1 5 of the thickness of the mortar, and generally not more than millimeters. As a mortar for trenches and plastering, the maximum particle size does not exceed millimeters, and the thickness of the sand has a great influence on the amount of cement, workability, strength and shrinkage.

Mixing water: The requirements for mortar mixing water and concrete mixing water are the same, and clean water without harmful impurities should be used to mix mortar.

Cement mortar is a mortar made of cement, sand and water, according to needs. Usually the ratio of cement, sand, and water is 1:3:

The density of cement mortar is 2000kg m3. The mortar used in the construction process is generally mixed on site for the convenience of construction.

The strength grade of cement mortar can be divided into M5, . In construction sites, cement mortar can be used as a binder for block masonry materials, such as cement mortar for masonry and red bricks; It can also be used for indoor and outdoor plastering. In addition, when cement mortar is used, it is often mixed with some additives such as microfoam, waterproof powder, etc., to improve its workability and viscosity.

When stones are added to the cement mortar in proportion, it becomes concrete.

In home decoration, floor tiles, wall tiles and masonry are bonded with cement mortar, which can not only enhance the adsorption capacity of the surface material and the base, but also protect the internal structure, and can be used as a leveling layer for the rough surface of the building, so in the decoration project, cement mortar is an indispensable material.

Cement is a powdery hydraulic inorganic cementitious material. After adding water and stirring, it forms a slurry, which can be hardened in air or water, and can firmly cement sand, stone and other materials together. For a long time, as an important cementitious material, it has been widely used in civil construction, water conservancy, national defense and other projects.

The mortar mix ratio is: (m5)1:; （m10）1：；（c20）1：：：c25）1：：：

1. The mix ratio of m5 cement mortar.

Cement: medium sand = 1:.

Condition: Construction level, average. sand, medium sand; Moisture content of sand:; Actual strength of cement:.

2. Cement mortar mix ratio.

The proportion of the amount of each material in the mortar trial: cement which celery sand = 260 1541 = 1.

Cement: grade; Cement: medium sand with a bulk density of 1541kg m3.

Condition: Construction level, average. Cement mortar for masonry trenches, with a strength of 30 50mm.

3. M10 cement mortar mix ratio.

The proportion of the amount of each material of mortar: cement sand = 240 1221 = 1.

Condition: Cement mortar for masonry rubble retaining wall with a strength of m10 and a consistency of 30 50mm.

4. C20 concrete mix ratio.

Cement: Sand: Crushed Stone: Water = 1:::

Condition: Slump 35--50mm. Sand type: coarse sand. Formulation Strength:.

Stones: River stones. Maximum particle size:; Cement strength grade, actual strength. Li opened his eyes.

5. C25 concrete mix ratio.

Cement: Sand: Crushed Stone: Water = 1:::

Condition: Slump 35--50mm. Sand type: coarse sand. Formulation Strength:.

Pebbles: River stones (pebbles). Maximum particle size:; Cement strength grade, actual strength.

Definition of mortar

It is made by mixing inorganic cementitious materials with fine aggregates and water in proportion, also known as mortar. It is used for masonry and plastering projects, which can be divided into masonry mortar and plastering mortar, the former is used for the masonry of bricks, stones, blocks, etc., and the installation of components; The latter is used for plastering the surface of walls, ground surfaces, roofs and beam-column structures to meet the requirements of protection and decoration.

In the ordinary mortar material, there is also a paste made of gypsum, lime plaster or clay mixed with fibrous reinforcing materials and water, which is called ash, plaster, mud or cement. Commonly used are hemp knife ash (lime paste mixed with hemp knife), paper tendon ash (lime paste mixed with paper tendons), gypsum ash (lime plaster mixed with plaster and paper tendons or glass fiber, etc.) and plaster (a small amount of lime and wheat straw or straw mixed with clay).