How long does it take for white cement to solidify and how long does it take for cement to solidify

The raw meal with appropriate ingredients is burned until partially melted, with calcium silicate as the main ingredient and an appropriate amount of gypsum added to the clinker with little iron content, and ground into a white hydraulic cementitious material. When grinding cement, limestone is allowed not to exceed 5% of the weight of cement. White cement is mostly used for decoration, and the manufacturing process is much better than ordinary cement.

The gaps that are mainly used to hook white porcelain tiles are generally not used on the wall, because the strength is not high. It is available at the building materials market or at the decoration material store.

It depends. The initial setting of qualified white cement is not earlier than 45 minutes, and the final setting is not later than 12 hours, generally at room temperature of about 20, and 60% solidification after 10 hours; 75% coagulation after 18 hours; 90% coagulation after 24 hours; 98% solidification after 48 hours, such as 25-28 can add 20% solidification rate. <

It depends. The initial setting of qualified white cement is not earlier than 45 minutes, and the final setting is not later than 12 hours, generally at room temperature of about 20, and 60% solidification after 10 hours; 75% coagulation after 18 hours; 90% coagulation after 24 hours; 98% solidification after 48 hours, such as 25-28 can add 20% solidification rate.

In interior decoration, we will use a variety of decoration materials, of which cement is a very important auxiliary material, for example, when we decorate the wall and floor, we often use cement mortar to find equal. When we use cement to plaster the wall, we generally have to wait until the cement solidifies before proceeding to the next step, many people do not know much about the cement solidification time, so how long does it take for the cement to solidify? Next, I will briefly introduce to you how long it takes for cement to solidify.

1. How long does it take for cement to solidify.

The time for cement to set is not fixed and is usually affected by factors such as local weather conditions, the variety of cement, admixtures such as retarders, etc. Under normal circumstances, it takes about 24 hours for ordinary cement to fully solidify from construction in summer; In winter, it takes about 2 to 3 days or so for it to fully solidify. According to the relevant national regulations, the initial setting of ordinary cement will not be earlier than 45 minutes, and the final setting will not be later than 10 hours.

For example, if we use Portland cement, the initial setting of the cement will not be earlier than 45 minutes, and the final setting will not be later than the hour.

Second, how to maintain the cement after plastering the wall.

1. The wall has just been coated with cement, pay attention to protect the cement wall, and do not touch the cement wall with your hands or other objects. Because the wall has just been plastered with cement, the cement has not yet solidified, and if an item touches the cement wall, it will leave traces. You have to wait until the cement is finally set before you can touch the wall and proceed to the next step.

2. After the cement plasters the wall, we need to pay attention to the maintenance, so as to strengthen the strength of the cement. Generally, after the final setting of the cement, it is necessary to start sprinkling water maintenance, we can sprinkle water on the cement wall and cover it with plastic film, if the local weather is hot, it can be watered every two hours, so as not to dry the cement wall too quickly, resulting in cracking and other problems on the wall. At room temperature, the maintenance time of cement wall should not be less than 7 days, of which the maintenance of the first three days is the most important.

Before using cement, it is best to understand the setting time of cement, if the cement setting time is too long, you can also shorten the cement setting time through admixtures.

This needs to look at the thickness.

Generally, it takes about 1-2 days for cement to fully solidify, of course, cement solidification is related to temperature and maintenance, and it is necessary to water and cure for about a week during the cement solidification period. Generally, the formwork can be dismantled in about 15 days, and the initial setting strength can be reached about 70% after 3 days, and if you want to achieve the final setting effect, that is, to achieve 100% design strength, then it will take about 28 days. Hardening after cement construction is divided into several stages, and the cement begins to enter the process of solidification 5-10 minutes after construction; Solidify outside after 1 hour; It can be coagulated after 6 hours; If you want to harden completely, it will take about 3 days.

If it is a very thick cement wall, it depends on the situation.

The national standard stipulates that the initial setting time of the six commonly used cements shall not be less than 45 minutes, the final setting time of Portland cement shall not be longer than hours, and the final setting time of the other five commonly used cements shall not be longer than 10 hours.

According to the speed of the hydration reaction and the main changes in physical and chemical chemistry, the solidification and hardening of cement can be divided into:

1. The initial reaction stage is 5-10 minutes;

2. Incubation period 1 hour;

4. Coagulation period 6 hours;

5. The hardening period is 6 hours to several years.

After cement and water will become a semi-fluid with plasticity, when after a period of time, the cement slurry gradually loses its plasticity and retains its original shape, this phenomenon is called coagulation (divided into initial and final setting). This is followed by a hardening phase, where the strength of the cement gradually increases.

In construction, it is required that the setting time of cement has a certain range. If it sets too quickly, the concrete will soon lose its fluidity, which will affect the vibration; On the contrary, if the condensation is too slow, it will affect the speed of construction. Therefore, the standard stipulates that the initial setting time and final setting time of cement should be within a certain range.

The determination of the setting time is carried out under certain temperature and humidity conditions using a cement slurry of standard consistency. From the time of adding water, to the point when the test needle sinks into the slurry and is far from the bottom plate.

omm, the required time is the initial setting time, at which point the net slurry begins to lose plasticity; Until the test needle sinks into the slurry no more than 1

omm, the required time is the final setting time, at which point the slurry completely loses plasticity and begins to enter the hardening phase.

Dear, hello, I am very happy to serve you to answer Oh, fast solidification cement about 30 minutes on the dry with Sun Tan Oh, quick-drying cement in a few minutes to begin to harden, for the requirements of a longer coagulation time of the project, can be used tartaric acid, citric acid or boric acid as a retarder, generally mixed with the amount of cement stupid, soluble in the mixing water), the coagulation time can be extended to 20-40 minutes. Fast-drying cement has the advantages of micro-expansion, normal strength under low temperature conditions, fast setting and hardening, high hourly strength and long-term stable and normal strength, which is the so-called "hourly cement". The strength of fast-drying cement is high in hours, and the strength of high-strength double-fast cement is more than 20MPa in 2h, about 30MPa in 4H, and more than 60MPa in 28 days.

There are many factors that affect the solidification of cement, including the fineness of cement, the curing time, the amount of gypsum added, and so on. 1. When using cement, if the particles of cement are finer, the area will be larger, and the cement will solidify faster. 2. After the cement construction is completed, it is necessary to carry out maintenance, and in the process of curing, the speed of cement solidification can be increased.

3. When using cement for construction. It is also necessary to add an appropriate amount of Kaiju gypsum, which can speed up the solidification of cement.