JPH1110630A - Packaging mortar preceding mortar of pump vehicle transfer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To labor-save labor hour, time and work of transporting and manufac turing material for preceding mortar by kneading specific amounts of calcium carbonate, lime, sand, cement and hardening retarder with suitable amount of water, and packaging a predetermined amount of mixture in a hermetically sealed bag. SOLUTION: Preceding mortar transferred by a pump vehicle is preceded in a hose at the initial time of transferring ready mixed concrete by the vehicle, and used to smoothly fluidize coarse aggregate of following concrete. After 0.0002 to 0.1 wt.% of hardening retarder is uniformly mixed with mortar containing 10 to 80 wt.% of calcium carbonate, 0.1 to 50 wt.% of lime, 10 to 80 wt.% of sand and 0.1 to 30 wt.% of cement, a predetermined amount of mixture is hermetically packaged. It is opened as needed for use, and the residue is sealed to be used for next necessary time. It is homogeneously produced in a factory, necessary amount is transported to a necessary job site to be immediately used to omit waste. And, trouble of transferring by the vehicle at the time of placing ready mixed concrete is prevented, a job site operation is rationalized to alleviate time and labor of an operator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging mortar for a preceding mortar for a pump truck transported for the purpose of airtightly packing a pre-manufactured mortar for transporting a pump truck and opening the package when necessary.

[0002] Since the mortar contains a curing retarder, it does not cure for a long time unless it comes into contact with the outside air. Therefore, the packaging mortar can be produced in a factory in advance and transported to a required number of construction sites for use.

[0003]

2. Description of the Related Art Conventionally, prior mortars for transporting pump cars are manufactured and used on site as needed.

[0004]

Therefore, not only is it necessary to carry the material for the preceding mortar to the site, but also if it is made into a mechanical kneading, the mixing amount at one time tends to increase, and there is a problem that an excessive amount can be obtained. Was. In addition, manual kneading not only requires time but also has a problem of heavy labor. Furthermore, if the amount of the mortar is small, there is a problem that the function of the preceding mortar cannot be sufficiently performed. In general, concrete casting work is transported by a pump truck, so that the production of the preceding mortar on site is the same as the addition of a foreign work, and the work procedure is disturbed.

[0005]

According to the present invention, however, the mortar containing the setting retarder is air-tightly packaged to form a packaging mortar. Therefore, if the packaging is not opened, the mortar can be stored immediately and used for a long period of time. Can be.

[0006] That is, the present invention is a packaging mortar for a preceding mortar to be transported by a pump truck, characterized in that a setting retarder is added to a cement mortar containing at least calcium carbonate, and a predetermined amount thereof is air-tightly packaged. Another invention is a prior mortar for transporting a pump car, characterized by adding an appropriate amount of water to calcium carbonate, lime, sand, cement and a setting retarder, kneading the mixture, and packing the mixture in a predetermined amount in an airtight bag. Mortar for packaging, 10 to 80% by weight of calcium carbonate, 0.1 to 50% by weight of lime, 10 to 80% by weight of sand,
0.1-30% by weight of cement and 0.000 set retarder
2 to 0.1. As the setting retarder, for example, molasses is used, but various setting retarders can be used as long as the cement hardens by contact with air and does not adversely affect concrete transported by a pump truck.

In the above-mentioned invention, if the content of lime and cement is less than 0.1% by weight, the strength is remarkably reduced and the mortar cannot function as a preceding mortar. Therefore, the added amount of lime and cement is preferably 1 to 20% by weight.
On the other hand, if the content of calcium carbonate is 10% by weight or less, the viscosity is increased and the mortar cannot function as a mortar preceding the pump. Therefore, the addition amount of calcium carbonate is preferably 20 to
50% by weight. When the molasses content is less than 0.0002% by weight, the effect of retarding the curing is remarkably reduced and no effect is observed. However, the effect is not changed even if the content is 0.1% by weight or more. 0.09% by weight.

[0008] The amount of water used for producing the mortar of the present invention varies slightly depending on the material used, but is generally such that it can easily flow when pressurized (generally, the amount of water is slightly smaller than that of cement mortar used for the exterior of buildings). It is preferable to add 40 to 50% by weight of water to all the materials.

[0009] The packaging mortar of the present invention is, for example, 25k.
The product is sealed in a plastic bag for g. Therefore, when using 50 kg of mortar preceding the pump truck, 2
Use 2 bags and 15kg if you need 65kg,
If the remainder is sealed, it can be used the next time it is needed, so that there is no waste.

[0010] Generally, the leading mortar for transporting a pump truck is used to advance raw concrete into a hose or the like at the beginning of transporting the ready-mixed truck and to smoothly flow coarse aggregate or the like of the subsequent concrete. If the inner surface is smoothed, the purpose can be achieved, but for example, mud may be used, but when mud etc. is mixed in ready-mixed concrete,
Cement mortar or mortar close to cement mortar is more preferable because the strength of the portion may be significantly reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a packaging mortar for a mortar preceding a pump truck, in which a mortar containing at least calcium carbonate is uniformly mixed with a setting retarder and then air-tightly packed in a predetermined amount.

The packaging mortar material is usually calcium carbonate, lime, sand and cement, to which an appropriate amount of a setting retarder and water are added, kneaded, and then sealed and packaged.

[0013]

[Example 1] Ingredients Weight% Calcium carbonate 30 Lime 28 Cement 2 Sand 40 Molasses 0.01 Color powder 0.001 Water (for all materials) 40 Put the above materials in a mixer, stir for 10 minutes, and uniformly When mixed (uniform color), aliquot into 25 kg thick PVC bags and seal.

The packaging mortar described above did not cure even after storage for 3 months and could be used as a preceding mortar. However, once opened, it is desirable to use it as soon as possible (for example, within 5 to 10 days).

[0015]

[Example 2] Compounding material weight% Calcium carbonate 25 Lime 25 Cement 2 Sand 48 Molasses 0.01 Color powder 0.001 Water (based on all materials) 40 Put the above materials in a mixer, stir for 15 minutes, and uniformly Once mixed, dispense into 25 kg thick PVC bags and seal.

[0016] Even if the packaging mortar is stored for three months,
It could not be cured and could be used as a mortar.

[0017]

According to the present invention, a setting retarder is added to the mortar, and the mortar is air-tightly packaged in a predetermined amount. This mortar is homogeneously produced in a factory, transported to a required site in a required number, and immediately used. There is an effect that can be done. However, if the package is relatively divided and packaged, waste can be eliminated, and if the package is sealed even if it remains, it can be used at the next necessary time, so that waste can be completely eliminated.

By using the packaging mortar of the present invention, it is possible not only to prevent the trouble of transporting the pump car at the time of placing the ready-mixed concrete, but also to rationalize the on-site work and reduce the time and labor of the operator. There are various effects such as.

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Claims (4)

[Claims] 1. A packaging mortar for preceding mortar for pumping trucks, wherein a setting retarder is added to a cement mortar containing at least calcium carbonate, and a predetermined amount thereof is air-tightly packaged. 2. A preceding mortar for pumping trucks, characterized in that calcium carbonate, lime, sand, cement and a setting retarder are mixed with an appropriate amount of water and kneaded and packed in a predetermined amount in an airtight bag. Packaging mortar. 3. 10 to 80% by weight of calcium carbonate, 0.1 to 50% by weight of lime, 10 to 80% by weight of sand, 0.1 to 30% by weight of cement and 0.0002 to 0.
3. A packaging mortar according to claim 2, wherein the mortar is a mortar for pumping trucks. 4. The packaging mortar according to claim 1, wherein the setting retarder is molasses.