How To Keep Your Concrete Mixer Driver Happy

BillyCement · 02-23-2009, 02:18 PM

Quote:

Originally Posted by yesitsconcrete

while there're many reasons conc crks, wtr isn't the leading cause of any i've ever seen,,, while a ' thicken'd edge ' is an accept'd method of placing slabs/aprons/etc, it doesn't add any strength to tension rqmts,,, look to an incorrect jnt pattern OR jnts placed at the wrong time, instead.

wtr can exacerbate other causes, of course, but alone isn't the cause,,, many think placing's conc's not difficult but, altho it doesn't look like it to many, it is a specialty trade,,, just my $.03 ! ! !

Actually, I only said that water is "usually" the cause of concrete cracking. I didn't say it was the only cause. As for making the edges thicker, I didn't say that it adds strength to the concrete, it only helps to prevent water from getting under the slab and rising (and thereby possibly cracking the concrete) when it freezes.

yesitsconcrete · 02-23-2009, 03:43 PM

billy, didn't mean to pee in your wheaties but i disagree completely,,, excess water'll reduce the compressive, flexural, AND tensile strength of conc,,, under the slab, it can cause base to ' pump ' thereby promoting random cracking,,, imn-s-hfo, tho, the LEADING cause's still incorrect an jnt pattern OR jnts installed incorrectly,,, a thicken'd edge won't satisfy my ' keep your base dry ' wish's, either... water still seeks its own level - gravity OR hydraulics.

BillyCement · 03-08-2009, 09:30 PM

You may be right, but I can only speak from experience. My entire 12' X 40' patio is made from extremely wet left-over concrete. I took no extraordinary measures to make sure it didn't crack except for making the edges deeper than the rest of the slab. And I've had no cracks except for one that occurred when we had a severe earth tremor many years ago.

change0070 · 02-27-2012, 11:08 PM

Mort. i am very interesting in the front discharge truck, which is widely used in America. Many china companies also produce front discharge type.but price is really expensive. about $200,000. and how much is it in U.S ? here is the front discharge mixer truck in china .

is there any big different from the mixer truck made in U.S ? and how much is the truck in U.S ?

Mort · 04-25-2012, 06:11 PM

change0070 - I'm not up on the pricing on various mixers, but $200,000 sounds about right for a front discharge. There are two main companies producing them in the U.S., OshKosh and Terex, which sells them under the Advance name. You can get them with a lot of different options, 3-7 axles, hydraulic chute extensions, water tanks, engines, you name it. As far as I know, they aren't available with manual transmissions anymore, which is just fine by me.

The one you have pictured looks similar to some of those made in the U.S. The one I run is a 7-axle, steer, two sets of duals, 3 sets of belly axles (two in front and one behind the drivers), and a Load Span Tag Axle behind the engine.

Mort · 05-16-2012, 09:53 PM

One other thing, in the sue-happy USA, they wouldn't even think about producing a truck without the safety railing going all the way around the catwalk.

Mort · 08-05-2012, 11:43 AM

I don't suppose a moderator could allow me to edit my first post so I can fix some broken picture links, and maybe add some things? Apparently, after a few years, you can't click a button on the bottom of the post anymore.